Deaths on July 20

Enguerrand de Monstrelet, French historian and author (b. 1400)

Enguerrand de Monstrelet (c. 1400 – 20 July 1453) was a French chronicler. He was born in Picardy, most likely into a family of the minor nobility.

20 Apr

Blockade runner
Three Genoese galleys and a Byzantine blockade runner fight their way through an Ottoman blockading fleet a few weeks before the fall of Constantinople.
29 May

Mehmed the Conqueror
Fall of Constantinople: Ottoman armies under Sultan Mehmed II Fatih capture Constantinople after a 53-day siege, ending the Byzantine Empire.