World War I
World War I known as the First World War or the Great War, was a global war originating in Europe that lasted from 28 July 1914 to 11 November 1918. Contemporaneously described as "the war to end all wars", it led to the mobilisation of more than 70 million military personnel, including 60 million Europeans, making it one of the largest wars in history, it is one of the deadliest conflicts in history, with an estimated nine million combatants and seven million civilian deaths as a direct result of the war, while resulting genocides and the 1918 influenza pandemic caused another 50 to 100 million deaths worldwide. On 28 June 1914, Gavrilo Princip, a Bosnian Serb Yugoslav nationalist, assassinated the Austro-Hungarian heir Archduke Franz Ferdinand in Sarajevo, leading to the July Crisis. In response, on 23 July Austria-Hungary issued an ultimatum to Serbia. Serbia's reply failed to satisfy the Austrians, the two moved to a war footing. A network of interlocking alliances enlarged the crisis from a bilateral issue in the Balkans to one involving most of Europe.
By July 1914, the great powers of Europe were divided into two coalitions: the Triple Entente—consisting of France and Britain—and the Triple Alliance of Germany, Austria-Hungary and Italy. Russia felt it necessary to back Serbia and, after Austria-Hungary shelled the Serbian capital of Belgrade on the 28th, partial mobilisation was approved. General Russian mobilisation was announced on the evening of 30 July; when Russia failed to comply, Germany declared war on 1 August in support of Austria-Hungary, with Austria-Hungary following suit on 6th. German strategy for a war on two fronts against France and Russia was to concentrate the bulk of its army in the West to defeat France within four weeks shift forces to the East before Russia could mobilise. On 2 August, Germany demanded free passage through Belgium, an essential element in achieving a quick victory over France; when this was refused, German forces invaded Belgium on 3 August and declared war on France the same day. On 12 August and France declared war on Austria-Hungary.
In November 1914, the Ottoman Empire entered the war on the side of the Alliance, opening fronts in the Caucasus and the Sinai Peninsula. The war was fought in and drew upon each power's colonial empire as well, spreading the conflict to Africa and across the globe; the Entente and its allies would become known as the Allied Powers, while the grouping of Austria-Hungary and their allies would become known as the Central Powers. The German advance into France was halted at the Battle of the Marne and by the end of 1914, the Western Front settled into a battle of attrition, marked by a long series of trench lines that changed little until 1917. In 1915, Italy opened a front in the Alps. Bulgaria joined the Central Powers in 1915 and Greece joined the Allies in 1917, expanding the war in the Balkans; the United States remained neutral, although by doing nothing to prevent the Allies from procuring American supplies whilst the Allied blockade prevented the Germans from doing the same the U. S. became an important supplier of war material to the Allies.
After the sinking of American merchant ships by German submarines, the revelation that the Germans were trying to incite Mexico to make war on the United States, the U. S. declared war on Germany on 6 April 1917. Trained American forces would not begin arriving at the front in large numbers until mid-1918, but the American Expeditionary Force would reach some two million troops. Though Serbia was defeated in 1915, Romania joined the Allied Powers in 1916 only to be defeated in 1917, none of the great powers were knocked out of the war until 1918; the 1917 February Revolution in Russia replaced the Tsarist autocracy with the Provisional Government, but continuing discontent at the cost of the war led to the October Revolution, the creation of the Soviet Socialist Republic, the signing of the Treaty of Brest-Litovsk by the new government in March 1918, ending Russia's involvement in the war. This allowed the transfer of large numbers of German troops from the East to the Western Front, resulting in the German March 1918 Offensive.
This offensive was successful, but the Allies rallied and drove the Germans back in their Hundred Days Offensive. Bulgaria was the first Central Power to sign an armistice—the Armistice of Salonica on 29 September 1918. On 30 October, the Ottoman Empire capitulated. On 4 November, the Austro-Hungarian empire agreed to the Armistice of Villa Giusti after being decisively defeated by Italy in the Battle of Vittorio Veneto. With its allies defeated, revolution at home, the military no longer willing to fight, Kaiser Wilhelm abdicated on 9 November and Germany signed an armistice on 11 November 1918. World War I was a significant turning point in the political, cultural and social climate of the world; the war and its immediate aftermath sparked numerous uprisings. The Big Four (Britain, the United States, It
Aktiengesellschaft is a German word for a corporation limited by share ownership whose shares may be traded on a stock market. The term is used in Germany and Switzerland, South Tyrol for companies incorporated there, it is used in Luxembourg, although the equivalent French language term Société Anonyme is more common. In the United Kingdom and the United States, the equivalent terms are "limited" and "incorporated", respectively; the German word Aktiengesellschaft is a compound noun made up of two elements: Aktien meaning shares, Gesellschaft meaning company or society. An English translation is thus "share company", or company limited by shares, or joint-stock company. In German the use of the term Aktien for shares is restricted to Aktiengesellschaften. Shares in other types of German companies are called Anteile rather than Aktien. In Germany and Austria, the legal basis of the AG is the German Aktiengesetz or the Austrian Aktiengesetz. Since the German commercial law requires all corporations to specify their legal form in their name, in order to inform the public of the limits on their liability, all German and Austrian stock corporations include Aktiengesellschaft or AG as part of their name as a suffix.
In Switzerland, the Company Limited by Shares is defined in Title Twenty-Six of the Code of Obligations. Article 950 specifies. German AGs have a "two-tiered board" structure, consisting of a supervisory board and a management board; the supervisory board is controlled by shareholders, although employees may have seats, depending on the size of the company. The management board directly runs the company, but its members may be removed by the supervisory board, which determines the management board's compensation; some German AGs have management boards which determine their own remuneration, but that situation is now uncommon. The general meeting is the supreme governing body of a Swiss company limited by shares, it elects the board of the external auditors. The board of directors may appoint and dismiss persons entrusted with managing and representing the company; the equivalent terms in other countries include the following, which mean either "share company/society" or "anonymous company/society".
Denmark – Aktieselskab Estonia – Aktsiaselts Norway – Aksjeselskap Sweden – Aktiebolag Finland – Osakeyhtiö Turkey – Anonim Şirket Argentina, Costa Rica, Peru and other Spanish speaking countries – Sociedad Anónima Portugal – Sociedade Anónima Brazil – Sociedade Anônima Bulgaria – Акционерно дружество, derived directly from the German AG Belgium, Netherlands – Naamloze Vennootschap Belgium, France – Société Anonyme Poland – Spółka akcyjna Italy – Società per Azioni United Kingdom – Public limited company United Kingdom - cymdeithas cyhoeddus cyfyngedig Croatia - dioničko društvo Romania – Societate pe acțiuni or "Societate anonimă" Russia – Публичное акционерное общество Greece - ανώνυμος εταιρεία Hungary – Részvénytársaság Gesellschaft mit beschränkter Haftung Fohlin, Caroline. "Chapter 4: The History of Corporate Ownership and Control in Germany". In Morck, Randall K. A History of Corporate Governance around the World: Family Business Groups to Professional Managers. University of Chicago Press.
Pp. 223–282. ISBN 0-226-53680-7. E McGaughey,'The Codetermination Bargains: The History of German Corporate and Labour Law' 23 Columbia Journal of European Law 135 Franks, Julian. "Ownership and Control of German Corporations". The Review of Financial Studies. Oxford University Press. 14: 943–977. Doi:10.1093/rfs/14.4.943. JSTOR 2696732. German Stock Corporations Act 1965 translation
Nuremberg is the second-largest city of the German federal state of Bavaria after its capital Munich, its 511,628 inhabitants make it the 14th largest city in Germany. On the Pegnitz River and the Rhine–Main–Danube Canal, it lies in the Bavarian administrative region of Middle Franconia, is the largest city and the unofficial capital of Franconia. Nuremberg forms a continuous conurbation with the neighbouring cities of Fürth and Schwabach with a total population of 787,976, while the larger Nuremberg Metropolitan Region has 3.5 million inhabitants. The city lies about 170 kilometres north of Munich, it is the largest city in the East Franconian dialect area. There are many institutions of higher education in the city, most notably the University of Erlangen-Nuremberg, with 39,780 students Bavaria's third and Germany's 11th largest university with campuses in Erlangen and Nuremberg and a university hospital in Erlangen. Nuremberg Airport is the second-busiest airport of Bavaria after Munich Airport, the tenth-busiest airport of Germany.
Staatstheater Nürnberg is one of the five Bavarian state theatres, showing operas, operettas and ballets, plays, as well as concerts. Its orchestra, Staatsphilharmonie Nürnberg, is Bavaria's second-largest opera orchestra after the Bavarian State Opera's Bavarian State Orchestra in Munich. Nuremberg is the birthplace of Johann Pachelbel. Nuremberg was the site of major Nazi rallies, it provided the site for the Nuremberg trials, which held to account many major Nazi officials; the first documentary mention of the city, in 1050, mentions Nuremberg as the location of an Imperial castle between the East Franks and the Bavarian March of the Nordgau. From 1050 to 1571 the city expanded and rose in importance due to its location on key trade-routes. King Conrad III established the Burgraviate of Nuremberg, with the first burgraves coming from the Austrian House of Raab. With the extinction of their male line around 1190, the last Raabs count's son-in-law, Frederick I from the House of Hohenzollern, inherited the burgraviate in 1192.
From the late 12th century to the Interregnum, the power of the burgraves diminished as the Hohenstaufen emperors transferred most non-military powers to a castellan, with the city administration and the municipal courts handed over to an Imperial mayor from 1173/74. The strained relations between the burgraves and the castellans, with gradual transferral of powers to the latter in the late 14th and early 15th centuries broke out into open enmity, which influenced the history of the city. Nuremberg is referred to as the "unofficial capital" of the Holy Roman Empire because the Imperial Diet and courts met at Nuremberg Castle; the Diets of Nuremberg played an important role in the administration of the empire. The increasing demands of the Imperial court and the increasing importance of the city attracted increased trade and commerce in Nuremberg. In 1219 Emperor Frederick II granted the Großen Freiheitsbrief, including town rights, Imperial immediacy, the privilege to mint coins, an independent customs policy - wholly removing the city from the purview of the burgraves.
Nuremberg soon became, with Augsburg, one of the two great trade-centers on the route from Italy to Northern Europe. In 1298 the Jews of the town were falsely accused of having desecrated the host, 698 of them were killed in one of the many Rintfleisch massacres. Behind the massacre of 1298 was the desire to combine the northern and southern parts of the city, which were divided by the Pegnitz; the Jews of the German lands suffered many massacres during the plague years of the mid-14th century. In 1349 Nuremberg's Jews suffered a pogrom, they were burned at the stake or expelled, a marketplace was built over the former Jewish quarter. The plague returned to the city in 1405, 1435, 1437, 1482, 1494, 1520 and 1534; the largest growth of Nuremberg occurred in the 14th century. Charles IV's Golden Bull of 1356, naming Nuremberg as the city where newly elected kings of Germany must hold their first Imperial Diet, made Nuremberg one of the three most important cities of the Empire. Charles was the patron of the Frauenkirche, built between 1352 and 1362, where the Imperial court worshipped during its stays in Nuremberg.
The royal and Imperial connection grew stronger in 1423 when the Holy Roman Emperor Sigismund of Luxembourg granted the Imperial regalia to be kept permanently in Nuremberg, where they remained until 1796, when the advance of French troops required their removal to Regensburg and thence to Vienna. In 1349 the members of the guilds unsuccessfully rebelled against the patricians in a Handwerkeraufstand, supported by merchants and some by councillors, leading to a ban on any self-organisation of the artisans in the city, abolishing the guilds that were customary elsewhere in Europe.
Vienna is the federal capital and largest city of Austria, one of the nine states of Austria. Vienna is Austria's primate city, with a population of about 1.9 million, its cultural and political centre. It is the 7th-largest city by population within city limits in the European Union; until the beginning of the 20th century, it was the largest German-speaking city in the world, before the splitting of the Austro-Hungarian Empire in World War I, the city had 2 million inhabitants. Today, it has the second largest number of German speakers after Berlin. Vienna is host to many major international organizations, including the United Nations and OPEC; the city is located in the eastern part of Austria and is close to the borders of the Czech Republic and Hungary. These regions work together in a European Centrope border region. Along with nearby Bratislava, Vienna forms a metropolitan region with 3 million inhabitants. In 2001, the city centre was designated a UNESCO World Heritage Site. In July 2017 it was moved to the list of World Heritage in Danger.
Apart from being regarded as the City of Music because of its musical legacy, Vienna is said to be "The City of Dreams" because it was home to the world's first psychoanalyst – Sigmund Freud. The city's roots lie in early Celtic and Roman settlements that transformed into a Medieval and Baroque city, the capital of the Austro-Hungarian Empire, it is well known for having played an essential role as a leading European music centre, from the great age of Viennese Classicism through the early part of the 20th century. The historic centre of Vienna is rich in architectural ensembles, including Baroque castles and gardens, the late-19th-century Ringstraße lined with grand buildings and parks. Vienna is known for its high quality of life. In a 2005 study of 127 world cities, the Economist Intelligence Unit ranked the city first for the world's most liveable cities. Between 2011 and 2015, Vienna was ranked second, behind Melbourne. In 2018, it replaced Melbourne as the number one spot. For ten consecutive years, the human-resource-consulting firm Mercer ranked Vienna first in its annual "Quality of Living" survey of hundreds of cities around the world.
Monocle's 2015 "Quality of Life Survey" ranked Vienna second on a list of the top 25 cities in the world "to make a base within."The UN-Habitat classified Vienna as the most prosperous city in the world in 2012/2013. The city was ranked 1st globally for its culture of innovation in 2007 and 2008, sixth globally in the 2014 Innovation Cities Index, which analyzed 162 indicators in covering three areas: culture and markets. Vienna hosts urban planning conferences and is used as a case study by urban planners. Between 2005 and 2010, Vienna was the world's number-one destination for international congresses and conventions, it attracts over 6.8 million tourists a year. The English name Vienna is borrowed from the homonymous Italian version of the city's name or the French Vienne; the etymology of the city's name is still subject to scholarly dispute. Some claim that the name comes from Vedunia, meaning "forest stream", which subsequently produced the Old High German Uuenia, the New High German Wien and its dialectal variant Wean.
Others believe that the name comes from the Roman settlement name of Celtic extraction Vindobona meaning "fair village, white settlement" from Celtic roots, vindo-, meaning "bright" or "fair" – as in the Irish fionn and the Welsh gwyn –, -bona "village, settlement". The Celtic word Vindos may reflect a widespread prehistorical cult of a Celtic God. A variant of this Celtic name could be preserved in the Czech and Polish names of the city and in that of the city's district Wieden; the name of the city in Hungarian, Serbo-Croatian and Ottoman Turkish has a different Slavonic origin, referred to an Avar fort in the area. Slovene-speakers call the city Dunaj, which in other Central European Slavic languages means the Danube River, on which the city stands. Evidence has been found of continuous habitation in the Vienna area since 500 BC, when Celts settled the site on the Danube River. In 15 BC the Romans fortified the frontier city they called Vindobona to guard the empire against Germanic tribes to the north.
Close ties with other Celtic peoples continued through the ages. The Irish monk Saint Colman is buried in Melk Abbey and Saint Fergil served as Bishop of Salzburg for forty years. Irish Benedictines founded twelfth-century monastic settlements. Evidence of these ties persists in the form of Vienna's great Schottenstift monastery, once home to many Irish monks. In 976 Leopold I of Babenberg became count of the Eastern March, a 60-mile district centering on the Danube on the eastern frontier of Bavaria; this initial district grew into the duchy of Austria. Each succeeding Babenberg ruler expanded the march east along the Danube encompassing Vienna and the lands east. In 1145 Duke Henry II Jasomirgott moved the Babenberg family residence from Klosterneuburg in Lower Austria to Vienna. From that time, Vienna remained the center of the Babenberg dynasty. In 1440 Vienna became the resident city of the Habsburg dynasty, it grew to become the de facto capital of the Holy Roman Empire in 1437 and a cultural centre for arts and science and fine cuisine.
Hungary occupied the city between 1485 and 1490. In the 16th and 1
A dynamo is an electrical generator that creates direct current using a commutator. Dynamos were the first electrical generators capable of delivering power for industry, the foundation upon which many other electric-power conversion devices were based, including the electric motor, the alternating-current alternator, the rotary converter. Today, the simpler alternator dominates large scale power generation, for efficiency and cost reasons. A dynamo has the disadvantages of a mechanical commutator. Converting alternating to direct current using power rectification devices is effective and economical; the word dynamo was another name for an electrical generator, still has some regional usage as a replacement for the word generator. The word "dynamo" was coined in 1831 by Michael Faraday, who utilized his invention toward making many discoveries in electricity and magnetism; the original "dynamo principle" of Wehrner von Siemens or Werner von Siemens referred only the direct current generators which use the self-excitation principle to generate DC power.
The earlier DC generators which used permanent magnets were not considered "dynamo electric machines". The invention of the dynamo principle was a huge technological leap over the old traditional permanent magnet based DC generators; the discovery of the dynamo principle made industrial scale electric power generation technically and economically feasible. After the invention of the alternator and that alternating current can be used as a power supply, the word dynamo became associated with the commutated direct current electric generator, while an AC electrical generator using either slip rings or rotor magnets would become known as an alternator. A small electrical generator built into the hub of a bicycle wheel to power lights is called a hub dynamo, although these are invariably AC devices, are magnetos; the electric dynamo uses rotating coils of wire and magnetic fields to convert mechanical rotation into a pulsing direct electric current through Faraday's law of induction. A dynamo machine consists of a stationary structure, called the stator, which provides a constant magnetic field, a set of rotating windings called the armature which turn within that field.
Due to Faraday's law of induction the motion of the wire within the magnetic field creates an electromotive force which pushes on the electrons in the metal, creating an electric current in the wire. On small machines the constant magnetic field may be provided by one or more permanent magnets; the commutator is needed to produce direct current. When a loop of wire rotates in a magnetic field, the magnetic flux through it, thus the potential induced in it, reverses with each half turn, generating an alternating current. However, in the early days of electric experimentation, alternating current had no known use; the few uses for electricity, such as electroplating, used direct current provided by messy liquid batteries. Dynamos were invented as a replacement for batteries; the commutator is a rotary switch. It consists of a set of contacts mounted on the machine's shaft, combined with graphite-block stationary contacts, called "brushes", because the earliest such fixed contacts were metal brushes.
The commutator reverses the connection of the windings to the external circuit when the potential reverses, so instead of alternating current, a pulsing direct current is produced. The earliest dynamos used permanent magnets to create the magnetic field; these were referred to as magnetos. However, researchers found that stronger magnetic fields, so more power, could be produced by using electromagnets on the stator; these dynamos. The field coils of the stator were separately excited by a separate, dynamo or magneto. An important development by Wilde and Siemens was the discovery that a dynamo could bootstrap itself to be self-excited, using current generated by the dynamo itself; this allowed the growth of a much more powerful field, thus far greater output power. Self-excited direct current dynamos have a combination of series and parallel field windings which are directly supplied power by the rotor through the commutator in a regenerative manner, they are started and operated in a manner similar to modern portable alternating current electric generators, which are not used with other generators on an electric grid.
There is a weak residual magnetic field that persists in the metal frame of the device when it is not operating, imprinted onto the metal by the field windings. The dynamo begins rotating; the residual magnetic field induces a small electrical current into the rotor windings as they begin to rotate. Without an external load attached, this small current is fully supplied to the field windings, which in combination with the residual field, cause the rotor to produce more current. In this manner the self-exciting dynamo builds up its internal magnetic fields until it reaches its normal operating voltage; when it is able to produce sufficient current to sustain both its internal fields and an external load, it is ready to be used. A self-excited dynamo with insufficient residual magnetic field in the metal frame will not be able to produce any current in the rotor, regardless of what speed the rotor spins; this situati
Berlin is the capital and largest city of Germany by both area and population. Its 3,748,148 inhabitants make it the second most populous city proper of the European Union after London; the city is one of Germany's 16 federal states. It is surrounded by the state of Brandenburg, contiguous with its capital, Potsdam; the two cities are at the center of the Berlin-Brandenburg capital region, which is, with about six million inhabitants and an area of more than 30,000 km², Germany's third-largest metropolitan region after the Rhine-Ruhr and Rhine-Main regions. Berlin straddles the banks of the River Spree, which flows into the River Havel in the western borough of Spandau. Among the city's main topographical features are the many lakes in the western and southeastern boroughs formed by the Spree and Dahme rivers. Due to its location in the European Plain, Berlin is influenced by a temperate seasonal climate. About one-third of the city's area is composed of forests, gardens, rivers and lakes; the city lies in the Central German dialect area, the Berlin dialect being a variant of the Lusatian-New Marchian dialects.
First documented in the 13th century and situated at the crossing of two important historic trade routes, Berlin became the capital of the Margraviate of Brandenburg, the Kingdom of Prussia, the German Empire, the Weimar Republic, the Third Reich. Berlin in the 1920s was the third largest municipality in the world. After World War II and its subsequent occupation by the victorious countries, the city was divided. East Berlin was declared capital of East Germany. Following German reunification in 1990, Berlin once again became the capital of all of Germany. Berlin is a world city of culture, politics and science, its economy is based on high-tech firms and the service sector, encompassing a diverse range of creative industries, research facilities, media corporations and convention venues. Berlin serves as a continental hub for air and rail traffic and has a complex public transportation network; the metropolis is a popular tourist destination. Significant industries include IT, biomedical engineering, clean tech, biotechnology and electronics.
Berlin is home to world-renowned universities, orchestras and entertainment venues, is host to many sporting events. Its Zoological Garden is one of the most popular worldwide. With the world's oldest large-scale movie studio complex, Berlin is an popular location for international film productions; the city is well known for its festivals, diverse architecture, contemporary arts and a high quality of living. Since the 2000s Berlin has seen the emergence of a cosmopolitan entrepreneurial scene. Berlin lies in northeastern Germany, east of the River Saale, that once constituted, together with the River Elbe, the eastern border of the Frankish Realm. While the Frankish Realm was inhabited by Germanic tribes like the Franks and the Saxons, the regions east of the border rivers were inhabited by Slavic tribes; this is why most of the villages in northeastern Germany bear Slavic-derived names. Typical Germanised place name suffixes of Slavic origin are -ow, -itz, -vitz, -witz, -itzsch and -in, prefixes are Windisch and Wendisch.
The name Berlin has its roots in the language of West Slavic inhabitants of the area of today's Berlin, may be related to the Old Polabian stem berl-/birl-. Since the Ber- at the beginning sounds like the German word Bär, a bear appears in the coat of arms of the city, it is therefore a canting arm. Of Berlin's twelve boroughs, five bear a Slavic-derived name: Pankow, Steglitz-Zehlendorf, Marzahn-Hellersdorf, Treptow-Köpenick and Spandau. Of its ninety-six neighborhoods, twenty-two bear a Slavic-derived name: Altglienicke, Alt-Treptow, Buch, Gatow, Kladow, Köpenick, Lankwitz, Lübars, Marzahn, Prenzlauer Berg, Schmöckwitz, Stadtrandsiedlung Malchow, Steglitz and Zehlendorf; the neighborhood of Moabit bears a French-derived name, Französisch Buchholz is named after the Huguenots. The earliest evidence of settlements in the area of today's Berlin are a wooden beam dated from 1192, remnants of a house foundation dated to 1174, found in excavations in Berlin Mitte; the first written records of towns in the area of present-day Berlin date from the late 12th century.
Spandau is first mentioned in 1197 and Köpenick in 1209, although these areas did not join Berlin until 1920. The central part of Berlin can be traced back to two towns. Cölln on the Fischerinsel is first mentioned in a 1237 document, Berlin, across the Spree in what is now called the Nikolaiviertel, is referenced in a document from 1244. 1237 is considered the founding date of the city. The two towns over time formed close economic and social ties, profited from the staple right on the two important trade routes Via Imperii and from Bruges to Novgorod. In 1307, they formed an alliance with a common external policy, their internal administrations still being separated. In 1415, Frederick I became the elector of the Margraviate of Brandenburg, which he ruled until 1440. During the 15th century, his successors established Berlin-Cölln as capital of the margraviate, subsequent members of the Hohenzol
Pretoria is a city in the northern part of Gauteng province in South Africa. It straddles the Apies River and has spread eastwards into the foothills of the Magaliesberg mountains, it is one of the country's three capital cities, serving as the seat of the administrative branch of government, of foreign embassies to South Africa. Pretoria has a reputation for being an academic city with three universities, the Council for Scientific and Industrial Research and the Human Sciences Research Council; the city hosts the National Research Foundation and the South African Bureau of Standards making the city a hub for research. Pretoria is the central part of the Tshwane Metropolitan Municipality, formed by the amalgamation of several former local authorities including Centurion and Soshanguve. There have been proposals to change the name of Pretoria itself to Tshwane, the proposed name change has caused some public controversy. Pretoria is named after the Voortrekker leader Andries Pretorius, within South Africa sometimes called the "Jacaranda City" due to the thousands of jacaranda trees planted in its streets and gardens.
Pretoria was founded in 1855 by Marthinus Pretorius, a leader of the Voortrekkers, who named it after his father Andries Pretorius and chose a spot on the banks of the "Apies rivier" to be the new capital of the South African Republic. The elder Pretorius had become a national hero of the Voortrekkers after his victory over Dingane and the Zulus in the Battle of Blood River; the elder Pretorius negotiated the Sand River Convention, in which the UK acknowledged the independence of the Transvaal. It became the capital of the South African Republic on 1 May 1860; the founding of Pretoria as the capital of the South African Republic can be seen as marking the end of the Boers' settlement movements of the Great Trek. During the First Boer War, the city was besieged by Republican forces in December 1880 and March 1881; the peace treaty which ended the war was signed in Pretoria on 3 August 1881 at the Pretoria Convention. The Second Boer War resulted in the end of the Transvaal Republic and start of British hegemony in South Africa.
The city surrendered to British forces under Frederick Roberts on 5 June 1900 and the conflict was ended in Pretoria with the signing of the Peace of Vereeniging on 31 May 1902 at Melrose House. The Pretoria Forts were built for the defence of the city just prior to the Second Boer War. Though some of these forts are today in ruins, a number of them have been preserved as national monuments; the Boer Republics of the ZAR and the Orange River Colony were united with the Cape Colony and Natal Colony in 1910 to become the Union of South Africa. Pretoria became the administrative capital of the whole of South Africa, with Cape Town the legislative capital and Bloemfontein served as the judicial capital. Between 1910 and 1994, the city was the capital of the province of Transvaal. On 14 October 1931, Pretoria achieved official city status; when South Africa became a republic in 1961, Pretoria remained its administrative capital. Pretoria is situated 55 km north-northeast of Johannesburg in the northeast of South Africa, in a transitional belt between the plateau of the Highveld to the south and the lower-lying Bushveld to the north.
It lies at an altitude of about 1,339 m above sea level, in a warm, fertile valley, surrounded by the hills of the Magaliesberg range. Pretoria has a humid subtropical climate with long hot rainy summers and short cool to cold, dry winters; the city experiences the typical winters of South Africa with cold, clear nights and mild to moderately warm days. Although the average lows during winter are mild, it can get cold due to the clear skies, with nighttime low temperatures in recent years in the range of 2 to −5 °C; the average annual temperature is 18.7 °C. This is rather high, considering the city's high altitude of about 1,339 metres, is due to its sheltered valley position, which acts as a heat trap and cuts it off from cool southerly and south-easterly air masses for much of the year. Rain is chiefly concentrated in the summer months, with drought conditions prevailing over the winter months, when frosts may be sharp. Snowfall is an rare event. During a nationwide heatwave in November 2011, Pretoria experienced temperatures that reached 39 °C, unusual for that time of the year.
Similar record-breaking extreme heat events occurred in January 2013, when Pretoria experienced temperatures exceeding 37 °C on several days. The year 2014 was one of the wettest on record for the city. A total of 914 mm fell up with 220 mm recorded in this month alone. In 2015 Pretoria saw its worst drought since 1982. January 2016 saw Pretoria reach a new record high of 44 °C on 7 January 2016. Depending on the extent of the area understood to constitute "Pretoria", the population ranges from 700,000 to 2.95 million. The main languages spoken in Pretoria are Sepedi, Setswana, Xitsonga and English; the city of Pretoria has the largest white population in Sub-Saharan Africa. Since its founding it has been a major Afrikaner population centre