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|1557 by topic|
|Arts and science|
|Birth and death categories|
|Births – Deaths|
|Establishments and disestablishments categories|
|Establishments – Disestablishments|
|Ab urbe condita||2310|
|Balinese saka calendar||1478–1479|
|English Regnal year||3 Ph. & M. – 4 Ph. & M.|
|Chinese calendar||丙辰年 (Fire Dragon)|
4253 or 4193
— to —
丁巳年 (Fire Snake)
4254 or 4194
|- Vikram Samvat||1613–1614|
|- Shaka Samvat||1478–1479|
|- Kali Yuga||4657–4658|
|Japanese calendar||Kōji 3|
|Minguo calendar||355 before ROC|
|Thai solar calendar||2099–2100|
1683 or 1302 or 530
— to —
1684 or 1303 or 531
|Wikimedia Commons has media related to 1557.|
- March: The Takeda clan besiege Katsurayama castle in eastern Japan. The siege ends with the last stand of the castle garrison and the complete destruction of Katsurayama, allowing the Takeda to further expand in Shinano Province.
- April 12 – The Spanish settlement of Cuenca, Ecuador, is founded.
- April 30 – Arauco War – Battle of Mataquito: Spanish forces of Governor Francisco de Villagra launch a dawn surprise attack against the Mapuche (headed by their toqui Lautaro), in present-day Chile.
- June 7 – Mary I of England joins her husband Philip II of Spain, in his war against France.
- June 10 – The New Testament of the Geneva Bible, a Protestant Bible translation into English (produced under the supervision of William Whittingham, and printed in Roman type), is published in Geneva.
- August 10 – Battle of St. Quentin: French forces under Marshal Anne de Montmorency are decisively defeated by the Spanish and English under Duke Emanuel Philibert of Savoy. Montmorency himself is captured, but Philip II refuses to press his advantage, and withdraws to the Netherlands.
- September 11–October 8 – The Colloquy of Worms convenes.
- October 27 – Emperor Ōgimachi accedes to the throne of Japan.
- Özdemir Pasha conquers the Red Sea port of Massawa, for the Ottoman Empire.
- Cossack chieftain Dimitrash tries to take Azov.
- With the permission of the Ming Dynasty government of China, and for the benefit of both Western and Eastern merchants, the Portuguese settle in Macau (retroceded in 1999). Direct Sino-Portuguese trade had existed since 1513, but this is the first official legal treaty port on traditional Chinese soil, that will form a long-term Western settlement.
- Spain becomes bankrupt, throwing the German banking houses into chaos.
- Gonville and Caius College, Cambridge, is refounded by John Caius.
- The following schools are founded in England:
- Welsh-born mathematician Robert Recorde publishes The Whetstone of Witte in London, containing the first recorded use of the equals sign and also the first use in English of plus and minus signs.
- German adventurer Hans Staden publishes a widely translated account of his detention by the Tupí people of Brazil, Warhaftige Historia und beschreibung eyner Landtschafft der Wilden Nacketen, Grimmigen Menschfresser-Leuthen in der Newenwelt America gelegen ("True Story and Description of a Country of Wild, Naked, Grim, Man-eating People in the New World, America").
- January 1 – Stephen Bocskay, Prince of Transylvania (d. 1606)
- February 11 – Johannes Wtenbogaert, Leader of the Remonstrants (d. 1644)
- February 15
- February 24 – Mathias, Holy Roman Emperor (d. 1619)
- March 21 – Anne Howard, Countess of Arundel, English countess and poet (d. 1630)
- March 22 – Casimir VI, Duke of Pomerania and Lutheran Administrator of Cammin Prince-Bishopric (d. 1605)
- April 4 – Lew Sapieha, Polish-Lithuanian noble (d. 1633)
- April 11 – Frederick, Count Palatine of Zweibrücken-Vohenstrauss-Parkstein (d. 1597)
- May 5 – Emanuel Philibert de Lalaing, Belgian noble and army commander (d. 1590)
- May 31 – Tsar Feodor I of Russia (d. 1598)
- June 10 – Leandro Bassano, Italian painter (d. 1622)
- June 28 – Philip Howard, 20th Earl of Arundel, English nobleman (d. 1595)
- August 16 – Agostino Carracci, Italian painter and graphical artist (d. 1602)
- August 19 – Frederick I, Duke of Württemberg (d. 1608)
- August 26 – Sibylle of Jülich-Cleves-Berg, Duchess of Jülich-Cleves-Berg by birth and by marriage Margravine of Burgau (d. 1628)
- September 4 – Sophie of Mecklenburg-Güstrow, Danish-Norwegian royal consort (d. 1631)
- September 11 – Joseph Calasanz, Spanish priest and founder of Piarists (d. 1648)
- September 16 – Jacques Mauduit, French composer (d. 1627)
- October 5 – Antoine Favre, Savoisian lawyer, first President of the Sovereign Senate of Savoy (d. 1624)
- date unknown
- Julius Caesar, English judge and politician (d. 1636)
- Giovanni Croce, Italian composer (d. 1609)
- Balthasar Gérard, assassin of William I of Orange (d. 1584)
- Toda Katsushige, Japanese warlord (d. 1600)
- Olaus Martini, Archbishop of Uppsala (d. 1609)
- Thomas Morley, English composer (d. 1602)
- Oda Nobutada, Japanese general (d. 1582)
- probable – Giovanni Gabrieli, Italian composer and organist (d. 1612)
- January 2 – Pontormo, Italian painter (b. 1494)
- January 4 – Philip, Duke of Mecklenburg, (b. 1514)
- January 8 – Albert Alcibiades, Margrave of Brandenburg-Kulmbach ("Albert the Warlike"), Prince of Bayreuth (b. 1522)
- March 13 – Louis de Bourbon de Vendôme, French cardinal (b. 1493)
- April 9 – Mikael Agricola, Finnish scholar (b. c. 1510)
- April 24 – Georg Rörer, German theologian (b. 1492)
- May 18 – John II, Count Palatine of Simmern, Count Palatine of Simmern (1509-1557) (b. 1492)
- June 11 – King John III of Portugal (b. 1502)
- July 10 – Giovanni Battista Ramusio, Italian geographer (b. 1485)
- July 16 – Anne of Cleves, fourth queen of Henry VIII of England (b. 1515)
- August 1 – Olaus Magnus, Swedish ecclesiastic and writer (b. 1490)
- August 18 – Claude de la Sengle, 48th Grandmaster of the Knights Hospitaller (b. 1494)
- September 1 – Jacques Cartier, French explorer (b. 1491)
- September 13 – John Cheke, English classical scholar and statesman (b. 1514)
- September 15 – Juan Álvarez de Toledo, Spanish Catholic cardinal (b. 1488)
- September 27 – Emperor Go-Nara of Japan (b. 1495)
- October 5 or October 6 – Kamran Mirza, Mughal prince (b. 1509)
- October 20 – Jean Salmon Macrin, French poet (b. 1490)
- October 25 – William Cavendish, English courtier (b. 1505)
- November 19
- December 6 – Elisabeth of Hesse, Hereditary Princess of Saxony (b. 1502)
- December 13 – Niccolò Fontana Tartaglia, Italian mathematician (b. 1499)
- December 27 – Queen Dangyeong, Korean royal consort (b. 1487)
- date unknown