1390

Events

January 19 - The Treaty of Lyck confirms an alliance between Vytautas and the Teutonic Knights, in the Lithuanian [Civil War (1389–1392)|Lithuanian Civil War] against Vytautas's cousin, Jogaila.
April 14 - John VII Palaiologos overthrows his grandfather, John V Palaiologos, as Byzantine Emperor.
April 19 - Robert III succeeds his father, Robert II, as King of Scotland.
May 26 - Lithuanian Civil War: The Treaty of [Königsberg (1390)|Treaty of Königsberg] is signed in Königsberg, between Samogitian nobles and representatives of the Teutonic Knights.
September 11 - Lithuanian Civil War: The coalition of Vytautas and the Teutonic Knights begins a 5-week siege of Vilnius. The Duke of Hereford is among the western European knights serving with the coalition.
September 17 - John VII Palaiologos seeks refuge with the Ottoman sultan Bayezid I, after John V Palaiologos is restored by his son, Manuel, and the Republic of Venice.
October 9 - Henry III succeeds his father, John I, as King of Castile and León.

Fall of Philadelphia
* The Ottomans take Philadelphia, the last Byzantine enclave of any significance in Anatolia.
Barquq is restored as Mamluk Sultan of Egypt, after overthrowing Sultan Hadji II.
Nasir ud din Muhammad Shah III overthrows his brother, Abu Bakr Shah, as Sultan of Delhi.
Manuel III succeeds his father, Alexios III, as Emperor of Trebizond.
Sikandar But-shikan succeeds Sikandar Shah, as Sultan of Kashmir.
Ko Cheng succeeds Che Bong Nga, as King of Champa.
Mahmud succeeds Sandaki as Mansa of the Mali Empire, restoring the Keita dynasty.
N'Diklam Sare succeeds Sare N'Dyaye, as ruler of the Jolof Empire.
The Kingdom of Kaffa is established in present day Ethiopia.
Templo Mayor, the main temple of the Aztec capital of Tenochtitlan, is built.
The Candi Surawana Temple is built in the Majapahit Kingdom.
Construction begins on San Petronio Basilica in Bologna.