Year 1391 (MCCCXCI) was a common year starting on Sunday (link will display full calendar) of the Julian calendar.
June 6 – Anti-Jewish pogroms erupt in Seville, Spain. Many thousands of Jews are massacred and the violence spreads throughout Spain and Portugal.
July 18 – Tokhtamysh–Timur war: Battle of the Kondurcha River – Timur defeats Tokhtamysh of the Golden Horde in present day southeast Russia.
August 5 – Anti-Jewish riots spread to Toledo, Spain and Barcelona. Many Jews leave Barcelona after the following massacres, though a large number remain in the city.
Manuel II Palaiologos becomes Byzantine emperor after his father, John V Palaiologos, dies of a nervous breakdown due to his continued humiliation by the Ottoman Empire.
Yusuf II succeeds Muhammed V as Nasrid Sultan of Granada (now southern Spain).
Stephen Dabiša succeeds Stephen Tvrtko I as King of Bosnia.
Shah Mansur becomes leader of the Timurid occupied Muzaffarid Empire in central Persia.
A group of Muzaffarids under Zafar Khan Muzaffar establish a new Sultanate at Gujarat in western India.
Vytautas the Great, claimant to the throne of Lithuania, forms an alliance with Muscovy.
Roman I succeeds Petru I as Prince of Moldavia (now Moldova and eastern Romania).
Konrad von Wallenrode succeeds Konrad Zöllner von Rotenstein as Grand Master of the Teutonic Knights.
Bridget of Sweden is canonized by Pope Boniface IX.
Ushkuinik pirates from Novgorod sack the Muscovy towns of Zhukotin and Kazan.
The Chinese invent toilet paper for use by their emperors.
Henry I Sinclair, Earl of Orkney, takes control of the Shetland Islands and the Faroe Islands.
The University of Ferrara is founded at the Italian Peninsula.
Ming government orders 50 million trees planted in Nanjing area.
October 31 – Edward, King of Portugal (d. 1438)
November 6 – Edmund Mortimer, 5th Earl of March, English politician (d. 1425)
Gedun Drub, 1st Dalai Lama (d. 1474)
Thomas West, 2nd Baron West (d. 1415)
January 16 – Muhammed V of Granada, Emir (b. 1338)
February 16 – John V Palaiologos, Byzantine emperor (b. 1332)
March 10 – King Tvrtko I of Bosnia (b. 1338)
November 1 – Amadeus VII, Count of Savoy (b. 1360)
Gaston III, Count of Foix, co-prince of Andorra
1391 Wikipedia (Text) CC BY-SA