1417

Events of 1417 
April 18 – Frederick I, Elector of Brandenburg begins to rule as margrave of Brandenburg
June 24 – The Isle of Man holds the first known Tynwald Day; the annual meeting of its parliament Tynwald which has continued every year until present.
July 27 – Avignon Pope Benedict XIII is deposed, bringing to an end the Great Western Schism.
November 11 – Pope Martin V succeeds Pope Gregory XII as the 206th pope.
 The use of street lighting is first recorded in London, when Sir Henry Barton, the mayor, orders lanterns with lights to be hung out on the winter evenings between Hallowtide and Candlemas.

 Births 
February 23 – Pope Paul II (d. 1471)
June 19 – Sigismondo Pandolfo Malatesta, lord of Rimini (died 1468)
November 23 – William FitzAlan, 16th Earl of Arundel, English politician (died 1487)
date unknown
Jöns Bengtsson Oxenstierna, regent of Sweden
Nicholas of Flüe, Swiss hermit and saint (died 1487)

 Deaths 
January – Art mac Art MacMurrough-Kavanagh, King of Leinster (born 1357)
April 29 – Louis II of Naples (born 1377)
September 4 – Robert Hallam, English Catholic bishop
September 16 – Francesco Zabarella, Italian jurist (b. 1360)
October 18 – Pope Gregory XII
December 14 – John Oldcastle, English Lollard leader
probable – Huitzilíhuitl, Aztec ruler of Tenochtitlan