Death of the Venetian Doge Tommaso Mocenigo, under whose rule victories were achieved against the Kingdom of Hungary and against the Ottoman Empire at the Battle of Gallipoli (1416).

A doge was an elected lord and head of state in several Italian city-states, notably Venice and Genoa, during the medieval and Renaissance periods. Such states were referred to as crowned republics. Doges wore a special hat, the Corno ducale and usually ruled life-long.

Tommaso Mocenigo (1343–1423) was doge of the Republic of Venice from 1414 until his death.

The Kingdom of Hungary was a monarchy in Central Europe that existed for nearly a millennium, from 1000 to 1946 and was a key part of the Habsburg monarchy from 1526-1918. The Catholic kingdom emerged as a continuation of the Grand Principality of Hungary upon the coronation of the first king Stephen I at Esztergom around the year 1000; his family led the monarchy for 300 years. By the 12th century, the kingdom had become a European power.

The Ottoman Empire, also called the Turkish Empire, was an imperial realm that controlled much of Southeast Europe, West Asia, and North Africa from the 14th to early 20th centuries; it also controlled parts of southeastern Central Europe, between the early 16th and early 18th centuries.

The Battle of Gallipoli occurred on 29 May 1416 between the fleets of the Republic of Venice and the Ottoman Empire off the port city of Gallipoli, the main Ottoman naval base. The battle was the main episode of a brief conflict between the two powers, resulting from Ottoman attacks against possessions and shipping of the Venetians and their allies in the Aegean Sea in 1414–1415. The Venetian fleet, under Pietro Loredan, was charged with transporting a Venetian embassy to the Ottoman sultan, but was authorized to attack if the Ottomans refused to negotiate. The subsequent events are known chiefly from a detailed letter written by Loredan after the battle.