1405

January–December

• May 29 - In England, Ralph Neville, 1st Earl of Westmorland, meets Archbishop Richard le Scrope of York and Earl of Norfolk Thomas Mowbray in Shipton Moor, tricks them to send their rebellious army home, and then imprisons them.
• June 8 - Archbishop Richard le Scrope of York and Thomas Mowbray, Earl of Norfolk, are executed in York on Henry IV's orders.
• July 11 - Ming Dynasty fleet commander Zheng He sets sail from Suzhou, to explore the world for the first time.
• October 5 - Christine de Pizan writes a letter to Queen Isabeau, urging her to intervene in the political struggle between the dukes of Burgundy and Orléans.
• November 17 - The Sultanate of Sulu is established on the Sulu Archipelago, off the coast of Mindanao in the Philippines.

  Date unknown

• Bath Abbey is built in England.
• The first record is written of whiskey being consumed in Ireland, where it is distilled by Catholic monks.
• Bellifortis, a book on military technology, is published by Konrad Kyeser.
• Christine de Pizan writes The Book of the City of Ladies.