Year 1416 (MCDXVI) was a leap year starting on Wednesday (link will display the full calendar) of the Julian calendar.
January 27 – The Republic of Ragusa is the first state in Europe to outlaw slavery.
May 30 – The Catholic Church burns Jerome of Prague as a heretic.
The Trezzo sull'Adda Bridge (the longest arch bridge in the world at the time) is destroyed.
Ottoman–Venetian maritime treaty (1416)
February 26 – Christopher of Bavaria (d. 1448)
March 27 – Antonio Squarcialupi, Italian organist and composer (d. 1480)
March 28 – Jodha of Mandore, Ruler of Marwar (d. 1489)
May 25 – Jakobus, nobleman from Lichtenberg in the northern part of Alsace (d. 1480)
October 26 – Edmund Grey, 1st Earl of Kent (d. 1490)
date unknown
Pal Engjëlli, Albanian Catholic clergyman (d. 1470)
Francis of Paola, founder of the Order of the Minims (d. 1507)
Piero di Cosimo de' Medici, ruler of Florence (d. 1469)
probable – Jacquetta of Luxembourg, daughter of Pierre de Luxembourg (d. 1472)
February 27 – Eleanor of Castile, queen consort of Navarre (b. c. 1363)
April 2 – King Ferdinand I of Aragon (b. 1379)
May 21 – Anna of Celje, queen consort of Poland (b. 1386)
May 30 – Jerome of Prague, Czech theologian (executed) (b. 1379)
June 15 – John, Duke of Berry, son of John II of France (b. 1340)
October 1 – Yaqub Spata, lord of Arta
October 14 – Henry the Mild, Duke of Brunswick-Lüneburg
date unknown – The Limbourg brothers, painters of the Très Riches Heures du Duc de Berry.
probable – Owain Glyndŵr, Welsh Prince and leader of the Welsh Revolt
1416 Wikipedia (Text) CC BY-SA