From Infogalactic: the planetary knowledge core
This article is about the year 1420.
|Centuries:||14th century – 15th century – 16th century|
|Decades:||1390s 1400s 1410s – 1420s – 1430s 1440s 1450s|
|Years:||1417 1418 1419 – 1420 – 1421 1422 1423|
|1420 by topic|
|Arts and science|
|Architecture - Art|
|State leaders - Sovereign states|
|Birth and death categories|
|Births - Deaths|
|Establishments and disestablishments categories|
|Establishments - Disestablishments|
|Art and literature|
|1420 in poetry|
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- March – The Çelebi Sultan Mehmed Mosque in Didymoteicho is inaugurated.
- May 21 – Treaty of Troyes: With the Burgundian faction dominant in France, King Charles VI of France acknowledges Henry V of England as his heir and as virtual ruler of most of France.
- May 25 – Henry the Navigator is appointed governor of the Order of Christ.
- June 2 – Catherine of Valois marries King Henry V of England.
- June 7 – Troops of the Republic of Venice capture Udine after a long siege, ending the independence of the Patriarchal State of Friuli, run by the Patriarch of Aquileia.
- October 22 – Ghiyāth al-dīn Naqqāsh, an envoy of the embassy sent by the Timurid ruler of Persia, Mirza Shahrukh (r. 1404–1447), to the Ming dynasty of China during the reign of the Yongle Emperor (r. 1402–1424), records his sight and travel over a large floating pontoon bridge at Lanzhou (constructed earlier in 1372) as he crosses the Yellow River on this day. He writes that it was: "...composed of twenty three boats, of great excellence and strength attached together by a long chain of iron as thick as a man's thigh, and this was moored on each side to an iron post as thick as a man's waist extending a distance of ten cubits on the land and planted firmly in the ground, the boats being fastened to this chain by means of big hooks. There were placed big wooden planks over the boats so firmly and evenly that all the animals were made to pass over it without difficulty."
- October 28 – Beijing is officially designated the capital of the Ming dynasty on the same year that the Forbidden City, the seat of government, is completed.
- November 1 – Hussite Wars: Sigismund, Holy Roman Emperor fails at the Battle of Vyšehrad and is ejected from Bohemia.
- Henry V of England commences construction of the ship Grace Dieu.
- Construction begins on the Temple of Heaven in Beijing, China while the palace complex of the Forbidden City is completed. In this year the Yongle Emperor confers the title "Beijing" ("Northern Capital") for the Ming dynasty's new capital city, replacing Nanjing.
- Construction of the dome of Florence Cathedral is started after Filippo Brunelleschi wins the commission for his "double shell" design.
- November 24 – John Stafford, 1st Earl of Wiltshire, English politician (d. 1473)
- date unknown
- June 11 – John III, Burgrave of Nuremberg (b. c. 1369)
- August 9 – Pierre d'Ailly, French theologian and cardinal (b. 1351)
- September 3 – Robert Stewart, Duke of Albany, regent of Scotland
- date unknown