1421
Year 1421 (MCDXXI) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar.
| Millennium: | 2nd millennium | 
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| Centuries: | |
| Decades: | |
| Years: | 
| 1421 by topic | 
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| Arts and science | 
| Leaders | 
| 
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| Birth and death categories | 
| Births – Deaths | 
| Establishments and disestablishments categories | 
| Establishments – Disestablishments | 
| Art and literature | 
| 1421 in poetry | 
| Gregorian calendar | 1421 MCDXXI | 
| Ab urbe condita | 2174 | 
| Armenian calendar | 870 ԹՎ ՊՀ | 
| Assyrian calendar | 6171 | 
| Balinese saka calendar | 1342–1343 | 
| Bengali calendar | 828 | 
| Berber calendar | 2371 | 
| English Regnal year | 8 Hen. 5 – 9 Hen. 5 | 
| Buddhist calendar | 1965 | 
| Burmese calendar | 783 | 
| Byzantine calendar | 6929–6930 | 
| Chinese calendar | 庚子年 (Metal Rat) 4117 or 4057 — to — 辛丑年 (Metal Ox) 4118 or 4058 | 
| Coptic calendar | 1137–1138 | 
| Discordian calendar | 2587 | 
| Ethiopian calendar | 1413–1414 | 
| Hebrew calendar | 5181–5182 | 
| Hindu calendars | |
| - Vikram Samvat | 1477–1478 | 
| - Shaka Samvat | 1342–1343 | 
| - Kali Yuga | 4521–4522 | 
| Holocene calendar | 11421 | 
| Igbo calendar | 421–422 | 
| Iranian calendar | 799–800 | 
| Islamic calendar | 823–824 | 
| Japanese calendar | Ōei 28 (応永28年) | 
| Javanese calendar | 1335–1336 | 
| Julian calendar | 1421 MCDXXI | 
| Korean calendar | 3754 | 
| Minguo calendar | 491 before ROC 民前491年 | 
| Nanakshahi calendar | −47 | 
| Thai solar calendar | 1963–1964 | 
| Tibetan calendar | 阳金鼠年 (male Iron-Rat) 1547 or 1166 or 394 — to — 阴金牛年 (female Iron-Ox) 1548 or 1167 or 395 | 
Events
    
    January–December
    
- February 2 – Yongle Emperor, third emperor of the Ming Dynasty, shifts the Ming capital from Nanjing to Beijing.
- March 3 – Zheng He receives imperial order from Yongle Emperor to bring imperial letters, silk products, and other gifts to various rulers of countries around the Indian Ocean.
- March 21 – Battle of Baugé: A small French force surprises and defeats a smaller English force under Thomas, Duke of Clarence, a brother of Henry V of England, in Normandy.[1]
- May 26 – Mehmed I, Sultan of the Ottoman Empire, dies and is succeeded by his son, Murad II.
- November 17–19 – St. Elizabeth's flood: The coastal area near Dordrecht in the Netherlands is flooded, due to the extremely high tide of the North Sea; 72 villages are drowned, killing about 10,000 people, and the course of the Meuse is changed.
Date unknown
    
- John III of Dampierre, Marquis of Namur, sells his estates to Philip the Good, Duke of Burgundy.
- The first patent is issued by the Republic of Florence.[2]
- Portuguese sailors sent by Henry the Navigator cross Cape Non, going as far as Cape Bojador.
- Traditional date – Larabanga Mosque is founded, in modern-day northern Ghana.
Births
    
- March 9 – Francesco Sassetti, Italian banker (d. 1490)
- May 29 – Charles, Prince of Viana (d. 1461)
- June 3 – Giovanni di Cosimo de' Medici, Italian noble (d. 1463)
- July 25 – Henry Percy, 3rd Earl of Northumberland, English politician (d. 1461)
- August 1 – Thomas Dutton, English knight (d. 1459)
- October 10 – John Paston, English politician (d. 1466)
- December 6 – King Henry VI of England (d. 1471)[3]
- date unknown – Sōgi, Japanese poet and Buddhist priest (d. 1502)
Deaths
    
- January 10 – Niccolò I Trinci, lord of Foligno (assassinated)
- January 15 – Helvis of Brunswick-Grubenhagen, queen consort of Armenia and Cyprus (born 1353)
- March 22 – Thomas of Lancaster, 1st Duke of Clarence, second son of Henry IV of England (killed in battle) (born 1388)[1]
- April 21 – John FitzAlan, 13th Earl of Arundel (born 1385)
- May – Balša III, ruler of Zeta
- May 26 – Mehmed I, Ottoman Sultan (b. 1389)
- June 21 – Jean Le Maingre, marshal of France (b. 1366)
References
    
- Cambridge Antiquarian Society (Cambridge, England) (1958). Proceedings of the Cambridge Antiquarian Society. Deighton Bell. p. 37-38.
- Terence, Kealey (1996), The Economic Laws of Scientific Research
- Szarmach, Paul E.; Tavormina, M. Teresa; Rosenthal, Joel T. (2017). Routledge Revivals: Medieval England (1998): An Encyclopedia. Taylor & Francis. p. 348. ISBN 9781351666374.
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