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This article is about the year 1423. For the number, see 1423 (number).
|Centuries:||14th century – 15th century – 16th century|
|Decades:||1390s 1400s 1410s – 1420s – 1430s 1440s 1450s|
|Years:||1420 1421 1422 – 1423 – 1424 1425 1426|
|1423 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|
|1423 in poetry|
|Ab urbe condita||2176|
|English Regnal year||1 Hen. 6 – 2 Hen. 6|
|Chinese calendar||壬寅年 (Water Tiger)
4119 or 4059
— to —
癸卯年 (Water Rabbit)
4120 or 4060
|- Vikram Samvat||1479–1480|
|- Shaka Samvat||1345–1346|
|- Kali Yuga||4524–4525|
|Japanese calendar||Ōei 30
|Minguo calendar||489 before ROC
|Thai solar calendar||1965–1966|
|Wikimedia Commons has media related to 1423.|
- April 27 – Hussite Wars – Battle of Hořice: The Taborites decisively beat the Utraquists.
- May 21/22 – Byzantine–Ottoman Wars – The Ottoman governor of Thessaly, Turakhan Beg, breaks through the Hexamilion wall and ravages the Peloponnese peninsula.
- July 31 – Hundred Years' War – Battle of Cravant: The French army is defeated at Cravant on the banks of the river Yonne near Auxerre by the English and their Burgundian allies.
- August – The Treaty of Sveti Srdj ends the Second Scutari War waged between the Serbian Despotate and the Venetian Republic over Scutari and other former possessions of Zeta captured by the Venetians.
- The three independent boroughs of Pamplona are united into a single town by royal decree after centuries of feuds.
- April 4 – Johann II of Nassau-Saarbrücken, Count of Nassau-Saarbrücken (1429–1472) (d. 1472)
- May 18 – Lady Katherine Percy, English nobility (d. 1475)
- May 30 – Georg von Peuerbach, Austrian astronomer (d. 1461)
- June 2 – Ferdinand I of Naples (d. 1494)
- June 15 – Gabriele Sforza, Archbishop of Milan (d. 1457)
- July 3 – Louis XI of France, monarch of the House of Valois, King of France from 1461 to 1483 (d. 1483)
- July 6 – Antonio Manetti, Italian mathematician and architect (d. 1497)
- August 24 – Thomas Rotherham, English cleric (d. 1500)
- September 10 – Eleanor, Princess of Asturias (d. 1425)
- August – Demetrios Chalkokondyles, Greek scholar (d. 1511)
- March – Richard Whittington, Lord Mayor of London (b. 1358)
- May 23 – Antipope Benedict XIII (b. 1328)
- October 20 – Henry Bowet, Archbishop of York
- November 1 – Nicholas Eudaimonoioannes, Byzantine diplomat
- December 15 – Michael Küchmeister von Sternberg, Grand Master of the Teutonic Knights