1521 (MDXXI ) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar , the 1521st year of the Common Era (CE) and Anno Domini (AD) designations, the 521st year of the 2nd millennium , the 21st year of the 16th century , and the 2nd year of the 1520s decade.
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January 22 : The Diet of Worms parliament is opened by Emperor Charles V in the German city of Worms .
Neacșu's letter , the oldest surviving document written in Romanian has the oldest appearance of the word "Rumanian"
April– June
April 7
April 16 – 18 – Martin Luther is examined before Emperor Charles V and the Diet of Worms , where he refuses to recant his writings and allegedly proclaims, "Here I stand", regarding his belief in the Bible alone, as the standard of Christian doctrine.
April 23 – Revolt of the Comuneros – Battle of Villalar : Castilian royalists defeat the rebels.[12] Juan López de Padilla , Francisco Maldonado , and Juan Bravo are executed the following day as the leaders of the rebels.
April 26 – Martin Luther leaves Worms and disappears for around a year[13] – he is rumored to be murdered, but is actually in hiding at the Wartburg castle.[14]
April 27 – Battle of Mactan : Ferdinand Magellan is killed in the Philippines .[15]
April or May – Battle of Tunmen in Tuen Mun (present-day Hong Kong): The Ming Dynasty navy defeats the Portuguese navy[16] (arguably the first Sino-European battle in world history).
May 17 – Edward Stafford, 3rd Duke of Buckingham , is executed for treason in Tower Hill .[17]
May 20 – At the Battle of Pampeluna in Italy , and alliance of forces from French and the Kingdom of Navarre forces defeat those of Spain .[18]
May 25 – The Diet of Worms ends when Charles V, Holy Roman Emperor issues the Edict of Worms , declaring Martin Luther an outlaw and banning his literature.[19]
May 27 – After death of his cousin, Jiajing , Prince Zhu Houcong becames the new Ming dynasty Emperor of China, taking the imperial name of the Emperor Jiajing becomes the new.[20]
June 25 – Suleiman the Magnificent begins the siege of Belgrade .
June 29 or 30 – The oldest surviving dateable document written primarily in the Romanian language : Neacșu's letter , written by a trader from Câmpulung , to Johannes Benkner, the mayor of Brașov , warning that the Ottoman Empire is preparing its troops to cross into Wallachia and Transylvania ; the script used is Romanian Cyrillic .
June 30 – Battle of Esquiroz : French forces under André de Foix , fighting for the exiled King of Navarre Henri d'Albret , are defeated by the Spanish , and forced to abandon their attempt to recover Henri's kingdom.[21]
Maria of Portugal, Duchess of Viseu
March 21 – Maurice, Elector of Saxony (d. 1553 )[30]
April 5 – Francesco Laparelli , Italian architect (d. 1570 )[31]
April 14 – Johann Marbach , German theologian (d. 1581 )[32]
April 18 – François de Coligny d'Andelot , French general (d. 1569 )[33]
May 8 – Petrus Canisius , Dutch Jesuit (d. 1597 )[34]
May 10 – John Ernest, Duke of Saxe-Coburg , (d. 1553 )[35]
June 8 – Maria of Portugal, Duchess of Viseu , daughter of King Manuel I (d. 1577 )[36]
June 21 – John II, Duke of Schleswig-Holstein-Haderslev (d. 1580 )[37]
August 4 – Pope Urban VII (d. 1590 )[38]
August 19 – Lodovico Guicciardini , Italian historian (d. 1589 )[39] [40]
October 1 – Frederick Magnus I, Count of Solms-Laubach , (d. 1561 )
November 21 – Edmund Sheffield, 1st Baron Sheffield , English baron (d. 1549 )[41]
November 29 – Marcantonio Maffei , Italian Catholic archbishop and cardinal (d. 1583 )[42]
December 1 – Takeda Shingen , Japanese warlord (d. 1573 )
December 13 – Pope Sixtus V (d. 1590 )[43]
date unknown
possible
Zhengde Emperor
Ferdinand Magellan
Juan Ponce de León
Saint Margaret of Lorraine
Pope Leo X
King Manuel I of Portugal
Blessed Domenico Spadafora
January 6 – Cardinal William de Croÿ (b. 1497 )[52]
January 15 – John II, Duke of Cleves (b. 1458 )[53]
April 20 – Zhengde Emperor of China (b. 1491 )[54]
April 24 – Spanish rebels (executed)[12]
April 27 – Ferdinand Magellan , Portuguese explorer (b. 1480 )[55]
April 28 – Suzanne, Duchess of Bourbon (b. 1491 )[56]
May 10 – Sebastian Brant , German humanist and satirist (b. 1457 )[57]
May 17 – Edward Stafford, 3rd Duke of Buckingham (executed) (b. 1478 )[17]
June 15 – Tamás Bakócz , Hungarian Catholic cardinal and statesman (b. 1442 )[58]
June 22 – Leonardo Loredan , Doge of Venice (b. 1436 )[59]
July – Juan Ponce de León , Spanish conquistador (b. 1460 )[60]
July 9 – Raffaele Riario , Italian cardinal (b. 1461 )[61]
August 27 – Josquin des Prez , Flemish composer (b. c. 1450 )[62]
September 12 – In the Italian War , the Holy Roman Empire abandons its siege of the French-controlled city of Parma after 17 days.[63]
September 15 –
October 7 – Margaret of Anhalt-Köthen , Princess of Anhalt by birth, Duchess consort of Saxony (b. 1494 )[64]
October 22 – Edward Poynings , Lord Deputy to King Henry VII of England (b. 1459 )[65]
October 24 – Robert Fayrfax , English Renaissance composer (b. 1464 )[66]
November 2 – Margaret of Lorraine , French Duchess of Alençon, Roman Catholic nun and blessed (b. 1463 )[67]
December 1 – Pope Leo X (b. 1475 )[68]
December 13 – King Manuel I of Portugal (b. 1469 )[69]
December 21 – Domenico Spadafora , Italian Roman Catholic priest and blessed (b. 1450 )[70]
Martínez-García, Ángeles; Gómez-Aguilar, Antonio (2019). "Magallanes: Building a Hero" . Revista Latina de Comunicación Socia . 74 : 618–636. Retrieved 25 July 2023 . Seaver, Henry Latimer . The Great Revolt in Castile: A Study of the Comunero Movement of 1520–1521 . New York: Octagon Books. p. 346.Beach, Frederick Converse; Morgan, Forrest; Rines, George Edwin; Roe, Edward Thomas; Dole, Nathan Haskell; Copeland, Thomas Campbell (1903). The Encyclopedia Americana . Americana Company. p. 94. Retrieved 26 July 2023 . Bricka, Carl Frederik (1892). Dansk biografisk lexikon (in Danish). Vol. 6. F. Hegel & Søn. p. 569. Retrieved 26 July 2023 . Fisquet, Honoré (1864). La France pontificale (in French). Etienne Repos. p. 229. Retrieved 27 July 2023 . "Johann II" . www.deutsche-biographie.de (in German). Retrieved 27 July 2023 .中国官场总览 (in Chinese). 經濟日報出版社. 1999. p. 1658. Retrieved 27 July 2023 .Mallett, Michael; Shaw, Christine (2012). The Italian Wars: 1494–1559 . Harlow: Pearson Education Limited. p. 141. ISBN 978-0-582-05758-6 .