1.
Ravenna
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Ravenna is the capital city of the Province of Ravenna, in the Emilia-Romagna region of Northern Italy. It was the city of the Western Roman Empire from 402 until that empire collapsed in 476. It then served as the capital of the Kingdom of the Ostrogoths until it was re-conquered in 540 by the Eastern Roman Empire. Afterwards, the city formed the centre of the Byzantine Exarchate of Ravenna until the invasion of the Lombards in 751, although an inland city, Ravenna is connected to the Adriatic Sea by the Candiano Canal. It is known for its well-preserved late Roman and Byzantine architecture, the origin of the name Ravenna is unclear, although it is believed the name is Etruscan. Some have speculated that ravenna is related to Rasenna, the term that the Etruscans used for themselves, the origins of Ravenna are uncertain. Ravenna consisted of houses built on piles on a series of islands in a marshy lagoon – a situation similar to Venice several centuries later. The Romans ignored it during their conquest of the Po River Delta, in 49 BC, it was the location where Julius Caesar gathered his forces before crossing the Rubicon. Later, after his battle against Mark Antony in 31 BC and this harbor, protected at first by its own walls, was an important station of the Roman Imperial Fleet. Nowadays the city is landlocked, but Ravenna remained an important seaport on the Adriatic until the early Middle Ages, during the German campaigns, Thusnelda, widow of Arminius, and Marbod, King of the Marcomanni, were confined at Ravenna. Ravenna greatly prospered under Roman rule, Emperor Trajan built a 70 km long aqueduct at the beginning of the 2nd century. During the Marcomannic Wars, Germanic settlers in Ravenna revolted and managed to seize possession of the city, for this reason, Marcus Aurelius decided not only against bringing more barbarians into Italy, but even banished those who had previously been brought there. In AD402, Emperor Honorius transferred the capital of the Western Roman Empire from Milan to Ravenna, at that time it was home to 50,000 people. However, in 409, King Alaric I of the Visigoths simply bypassed Ravenna, after many vicissitudes, Galla Placidia returned to Ravenna with her son, Emperor Valentinian III and the support of her nephew Theodosius II. The late 5th century saw the dissolution of Roman authority in the west, Odoacer ruled as King of Italy for 13 years, but in 489 the Eastern Emperor Zeno sent the Ostrogoth King Theoderic the Great to re-take the Italian peninsula. After losing the Battle of Verona, Odoacer retreated to Ravenna, Theoderic took Ravenna in 493, supposedly slew Odoacer with his own hands, and Ravenna became the capital of the Ostrogothic Kingdom of Italy. Both Odoacer and Theoderic and their followers were Arian Christians, but co-existed peacefully with the Latins, Ravennas Orthodox bishops carried out notable building projects, of which the sole surviving one is the Capella Arcivescovile. Theoderic allowed Roman citizens within his kingdom to be subject to Roman law, the Goths, meanwhile, lived under their own laws and customs
2.
Geographic coordinate system
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A geographic coordinate system is a coordinate system used in geography that enables every location on Earth to be specified by a set of numbers, letters or symbols. The coordinates are chosen such that one of the numbers represents a vertical position. A common choice of coordinates is latitude, longitude and elevation, to specify a location on a two-dimensional map requires a map projection. The invention of a coordinate system is generally credited to Eratosthenes of Cyrene. Ptolemy credited him with the adoption of longitude and latitude. Ptolemys 2nd-century Geography used the prime meridian but measured latitude from the equator instead. Mathematical cartography resumed in Europe following Maximus Planudes recovery of Ptolemys text a little before 1300, in 1884, the United States hosted the International Meridian Conference, attended by representatives from twenty-five nations. Twenty-two of them agreed to adopt the longitude of the Royal Observatory in Greenwich, the Dominican Republic voted against the motion, while France and Brazil abstained. France adopted Greenwich Mean Time in place of local determinations by the Paris Observatory in 1911, the latitude of a point on Earths surface is the angle between the equatorial plane and the straight line that passes through that point and through the center of the Earth. Lines joining points of the same latitude trace circles on the surface of Earth called parallels, as they are parallel to the equator, the north pole is 90° N, the south pole is 90° S. The 0° parallel of latitude is designated the equator, the plane of all geographic coordinate systems. The equator divides the globe into Northern and Southern Hemispheres, the longitude of a point on Earths surface is the angle east or west of a reference meridian to another meridian that passes through that point. All meridians are halves of great ellipses, which converge at the north and south poles, the prime meridian determines the proper Eastern and Western Hemispheres, although maps often divide these hemispheres further west in order to keep the Old World on a single side. The antipodal meridian of Greenwich is both 180°W and 180°E, the combination of these two components specifies the position of any location on the surface of Earth, without consideration of altitude or depth. The grid formed by lines of latitude and longitude is known as a graticule, the origin/zero point of this system is located in the Gulf of Guinea about 625 km south of Tema, Ghana. To completely specify a location of a feature on, in, or above Earth. Earth is not a sphere, but a shape approximating a biaxial ellipsoid. It is nearly spherical, but has an equatorial bulge making the radius at the equator about 0. 3% larger than the radius measured through the poles, the shorter axis approximately coincides with the axis of rotation
3.
Roman Catholic
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The Catholic Church, also known as the Roman Catholic Church or the Universal Church, is the largest Christian church, with more than 1.28 billion members worldwide. As one of the oldest religious institutions in the world, it has played a prominent role in the history, headed by the Bishop of Rome, known as the Pope, the churchs doctrines are summarised in the Nicene Creed and the Apostles Creed. Its central administration is located in Vatican City, enclaved within Rome, the Catholic Church is notable within Western Christianity for its sacred tradition and seven sacraments. It teaches that it is the one church founded by Jesus Christ, that its bishops are the successors of Christs apostles. The Catholic Church maintains that the doctrine on faith and morals that it declares as definitive is infallible. The Latin Church, the Eastern Catholic Churches, as well as such as mendicant orders and enclosed monastic orders. Among the sacraments, the one is the Eucharist, celebrated liturgically in the Mass. The church teaches that through consecration by a priest the sacrificial bread and wine become the body, the Catholic Church practises closed communion, with only baptised members in a state of grace ordinarily permitted to receive the Eucharist. The Virgin Mary is venerated in the Catholic Church as Queen of Heaven and is honoured in numerous Marian devotions. The Catholic Church has influenced Western philosophy, science, art and culture, Catholic spiritual teaching includes spreading the Gospel while Catholic social teaching emphasises support for the sick, the poor and the afflicted through the corporal and spiritual works of mercy. The Catholic Church is the largest non-government provider of education and medical services in the world, from the late 20th century, the Catholic Church has been criticised for its doctrines on sexuality, its refusal to ordain women and its handling of sexual abuse cases. Catholic was first used to describe the church in the early 2nd century, the first known use of the phrase the catholic church occurred in the letter from Saint Ignatius of Antioch to the Smyrnaeans, written about 110 AD. In the Catechetical Discourses of Saint Cyril of Jerusalem, the name Catholic Church was used to distinguish it from other groups that call themselves the church. The use of the adjective Roman to describe the Church as governed especially by the Bishop of Rome became more widespread after the Fall of the Western Roman Empire and into the Early Middle Ages. Catholic Church is the name used in the Catechism of the Catholic Church. The Catholic Church follows an episcopal polity, led by bishops who have received the sacrament of Holy Orders who are given formal jurisdictions of governance within the church. Ultimately leading the entire Catholic Church is the Bishop of Rome, commonly called the pope, in parallel to the diocesan structure are a variety of religious institutes that function autonomously, often subject only to the authority of the pope, though sometimes subject to the local bishop. Most religious institutes only have male or female members but some have both, additionally, lay members aid many liturgical functions during worship services
4.
Roman Catholic Archdiocese of Ravenna-Cervia
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The Archdiocese of Ravenna-Cervia is a metropolitan archdiocese of the Roman Catholic Church in the Emilia-Romagna region of Italy. The cathedral of the archdiocese is the Cathedral Basilica of the Resurrection of Our Lord in Ravenna, the current Metropolitan Archbishop of the Roman Catholic Archdiocese of Ravenna-Cervia, since his appointment by Pope Benedict XVI on Saturday, November 17,2012, is Lorenzo Ghizzoni. The Archdiocese of Ravenna was a Roman Catholic diocese in Emilia-Romagna, the archdiocese was erected in the 1st century as a diocese, and was elevated to an archdiocese in the 5th century. Among its famous archbishops are Saint Peter Chrysologus, a Doctor of the Church, and Saint Guido Maria Conforti, the early medieval Ravenna papyri form an important record from the churchs chancery between the 5th and 10th century. In 1947 the archdiocese was merged with the Diocese of Cervia into the Archdiocese of Ravenna-Cervia, the archdiocese was created in 1947 through the merger of the Archdiocese of Ravenna and the Diocese of Cervia. The archdiocese in 2014 had one priest for every 1,830 Catholics,2 pt. (,372,164 p. leaves of plates,503, p. leaf of plates, ill. Later editions 1723, in Patrologia Latina, and 2006 Metropolitan Archdiocese of Ravenna-Cervia
5.
Emilia-Romagna
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Emilia-Romagna is an administrative Region of Northeast Italy, comprising the historical regions of Emilia and Romagna. It has an area of 22,446 km2, and about 4.4 million inhabitants, Emilia-Romagna is one of the wealthiest and most developed regions in Europe, with the third highest GDP per capita in Italy. Bologna, its capital, has one of Italys highest quality of life indices, the name Emilia-Romagna is a legacy of Ancient Rome. Emilia derives from the via Aemilia, the Roman road connecting Rome to northern Italy, completed in 187 B. C. and named after the consul Marcus Aemilius Lepidus. Romagna derives from Romània, the name of the Eastern Roman Empire applied to Ravenna by the Lombards when the western Empire had ceased to exist, before the Romans took control of present-day Emilia-Romagna, it had been part of the Etruscan world and then that of the Gauls. During the first thousand years of Christianity trade flourished, as did culture and religion, afterwards the University of Bologna—arguably the oldest university in Europe—and its bustling towns kept trade and intellectual life alive. After the referendum of 2006, seven municipalities of Montefeltro were detached from the Province of Pesaro, the municipalities are Casteldelci, Maiolo, Novafeltria, Pennabilli, San Leo, SantAgata Feltria and Talamello. On 20 and 29 May 2012 two powerful earthquakes hit the area and they killed at least 27 people and caused churches and factories to collapse. The 5.8 magnitude quake left 14,000 people homeless, the region of Emilia-Romagna consists of nine provinces and covers an area of 22,446 km2, ranking sixth in Italy. Nearly half of the consists of plains while 27% is hilly. The regions section of the Apennines is marked by areas of flisch, badland erosion, the mountains stretch for more than 300 km from the north to the south-east, with only three peaks above 2,000 m – Monte Cimone, Monte Cusna and Alpe di Succiso. The plain was formed by the retreat of the sea from the Po basin. Almost entirely marshland in ancient times, its history is characterised by the work of its people to reclaim. All the rivers rise locally in the Apennines except for the Po, the northern border of Emilia-Romagna follows the path of the river for 263 km. Emilia Romagna has been a populated area since ancient times. Inhabitants over the centuries have radically altered the landscape, building cities, reclaiming wetlands, all these transformations in past centuries changed the aspect of the region, converting large natural areas to cultivation, up until the 1960s. The trend then changed, and agricultural lands began giving way to residential and industrial areas, the increase of urban-industrial areas continued at very high rates until the end of the 2010s. In the same period, hilly and mountainous areas saw an increase in the registration of semi-natural areas, land use changes can have strong effects on ecological functions
6.
Architectural style
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An architectural style is characterized by the features that make a building or other structure notable or historically identifiable. A style may include such elements as form, method of construction, building materials, styles therefore emerge from the history of a society. They are documented in the subject of architectural history, at any time several styles may be fashionable, and when a style changes it usually does so gradually, as architects learn and adapt to new ideas. Styles often spread to places, so that the style at its source continues to develop in new ways while other countries follow with their own twist. A style may also spread through colonialism, either by foreign colonies learning from their home country, one example is the Spanish missions in California, brought by Spanish priests in the late 18th century and built in a unique style. After a style has gone out of fashion, revivals and re-interpretations may occur, for instance, classicism has been revived many times and found new life as neoclassicism. Each time it is revived, it is different, the Spanish mission style was revived 100 years later as the Mission Revival, and that soon evolved into the Spanish Colonial Revival. Vernacular architecture works slightly differently and is listed separately and it is the native method of construction used by local people, usually using labour-intensive methods and local materials, and usually for small structures such as rural cottages. It varies from region to region even within a country, as western society has developed, vernacular styles have mostly become outmoded due to new technology and to national building standards. Paul Jacobsthal and Josef Strzygowski are among the art historians who followed Riegl in proposing grand schemes tracing the transmission of elements of styles across great ranges in time and this type of art history is also known as formalism, or the study of forms or shapes in art. Terms originated to describe architectural periods were often applied to other areas of the visual arts, and then more widely still to music, literature. In architecture stylistic change often follows, and is possible by. While many architectural styles explore harmonious ideals, Mannerism wants to take style a step further and explores the aesthetics of hyperbole, Mannerism is notable for its intellectual sophistication as well as its artificial qualities. Mannerism favours compositional tension and instability rather than balance and clarity, the definition of Mannerism, and the phases within it, continues to be the subject of debate among art historians. An example of mannerist architecture is the Villa Farnese at Caprarola. in the country side outside of Rome. The proliferation of engravers during the 16th century spread Mannerist styles more quickly than any previous styles, a center of Mannerist design was Antwerp during its 16th-century boom. Through Antwerp, Renaissance and Mannerist styles were introduced in England, Germany. During the Mannerist Renaissance period, architects experimented with using architectural forms to emphasize solid, the Renaissance ideal of harmony gave way to freer and more imaginative rhythms
7.
Byzantine architecture
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Byzantine architecture is the architecture of the Byzantine Empire, also known as the Later Roman or Eastern Roman Empire. Byzantine architecture was influenced by Roman and Greek architecture and later Sassanian. Early Byzantine architecture drew upon earlier elements of Roman architecture, stylistic drift, technological advancement, and political and territorial changes meant that a distinct style gradually resulted in the Greek cross plan in church architecture. Most of the structures are sacred in nature, with secular buildings mostly known only through contemporaneous descriptions. Prime examples of early Byzantine architecture date from Justinian Is reign and survive in Ravenna and Istanbul, secular structures include the ruins of the Great Palace of Constantinople, the innovative walls of Constantinople and Basilica Cistern. A frieze in the Ostrogothic palace in Ravenna depicts an early Byzantine palace, remarkable engineering feats include the 430 m long Sangarius Bridge and the pointed arch of Karamagara Bridge. The period of the Macedonian dynasty, traditionally considered the epitome of Byzantine art, has not left a legacy in architecture. The cross-in-square type also became predominant in the Slavic countries which were Christianized by Salonikas missionaries during the Macedonian period, only national forms of architecture can be found in abundance due to this. Those styles can be found in many Transcaucasian countries, such as Russia, Bulgaria, Serbia, Croatia and other Slavic lands, the Paleologan period is well represented in a dozen former churches in Istanbul, notably St Saviour at Chora and St Mary Pammakaristos. Unlike their Slavic counterparts, the Paleologan architects never accented the vertical thrust of structures, as a result, there is little grandeur in the late medieval architecture of Byzantium. Other churches from the years predating the fall of Constantinople survive on Mount Athos. Those of the type we must suppose were nearly always vaulted. The most famous church of this type was that of the Holy Apostles, vaults appear to have been early applied to the basilican type of plan, for instance, at Hagia Irene, Constantinople, the long body of the church is covered by two domes. At Saint Sergius, Constantinople, and San Vitale, Ravenna, churches of the central type, finally, at Hagia Sophia a combination was made which is perhaps the most remarkable piece of planning ever contrived. This unbroken area, about 260 ft long, the part of which is over 100 ft wide, is entirely covered by a system of domical surfaces. Above the conchs of the small apses rise the two great semi-domes which cover the hemicycles, and between these bursts out the vast dome over the central square. On the two sides, to the north and south of the dome, it is supported by vaulted aisles in two storeys which bring the form to a general square. At the Holy Apostles five domes were applied to a cruciform plan, after the 6th century there were no churches built which in any way competed in scale with these great works of Justinian, and the plans more or less tended to approximate to one type
8.
Crux gemmata
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A crux gemmata is a form of cross typical of Early Christian and Early Medieval art, where the cross, or at least its front side, is principally decorated with jewels. In an actual cross, rather than an image of one. Examples in metalwork are the Cross of Justin II, the cross in the Staffordshire Hoard, the Cross of Lothair, the Iberian Cross of the Angels and Victory Cross. In the case of the cross, such decorative embellishment was especially common, the cross very often has splayed ends to its arms, but the proportions of the vertical axis to the horizontal one depends entirely on the needs of the composition, and varies greatly. Pendilia, or hanging jewels or ornaments, may hang from the arms, especially the letters alpha, the motif is first seen in a sarcophagus fragment from the late 4th century, the splayed ends of the arms are present from the earliest examples. The jewelled cross also served as a symbol of the Christian version of the Tree of Life, the Staffordshire Hoard crumpled cross has vine leaves showing at the corners and represents Jesus the vine. It is sometimes shown on a mound representing paradise, with four rivers flowing down it, the link of the cross generally with the Tree of Life appears frequently in the hymns of Venantius Fortunatus. Sharp has shown the interlace on the front of the Staffordshire Hoard cross corresponds with the river or tree of life described in Revelation 22. For much of the period, a jewelled cross is recorded as decorating the presumed site of the Crucifixion. It was presented by the Eastern Emperor Theodosius II, there was resistance to representations of the cross with the body of Christ on it, a practice that did not begin until the 5th century, becoming more common in the 6th. It was the Nestorians, another force of the opposite persuasion. In so-called mystical images, such as the mosaic at the Basilica of Sant Apollinare in Classe, Ravenna. A poem by St Paulinus of Nola allows a reconstruction of a mosaic apse he had commissioned in the basilica of St Felix of Nola at Cimitile in the early 5th century. At the bottom of the semi-dome were twelve lambs, six on each side, with a haloed Lamb of God on a hillock in the centre. The bottom of the mosaic at Santa Pudenziana in Rome originally also had a level with this. The crux gemmata is commonly seen on coins, often held by a figure of Victory, another common Byzantine coin type shows a cross with a stepped base, which should be understood as a crux gemmata even though scale does not normally allow any indication of gems. The apse mosaic in the Basilica of Saint Paul Outside the Walls has an example with thirteen jewels and it is not usual to use the term crux gemmata for crosses from more recent periods, especially for small crosses that fall under the category of jewellery. The Female Crucifix, Images of St. Wilgefortis Since the Middle Ages, Wilfrid Laurier University Press,2001, ISBN 0-88920-365-2, google books Hellemo, Geir
Media related to Sant'Apollinare in Classe at Wikimedia Commons
