Year 1370 (MCCCLXX) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar.
May 24 – The Treaty of Stralsund ends the war between Denmark and the Hanseatic League.
October 20 – Philip of Anjou, Titular Emperor of Constantinople, marries Elisabeth of Slavonia, daughter of Stephen, duke of Transylvania and Slavonia, and Margareta of Bavaria.
December 20 – Pope Gregory XI succeeds Pope Urban V as the 201st pope.
The steel crossbow is first used as a weapon of war.
Xian City (Chang'an) is fortified against invasion.
Timur completes his conquest of Central Asia and parts of Persia, establishing the Timurid Empire.
Trần Nghệ Tông deposes Dương Nhật Lễ as emperor of Đại Việt, now Vietnam.
For the second time since 1368, Grand Duchy of Moscow attacks Tver, which again counter-attacks with the aid of the Grand Duchy of Lithuania and the Blue Horde.
Casimir III of Poland is succeeded jointly by his sister, Elisabeth of Kujavia, and her son, Louis I of Hungary, beginning the rule of Poland by the Capet-Anjou family.
The Siege of Limoges is launched.
April 11 – Frederick I, Elector of Saxony (d. 1428)
July 23 – Pier Paolo Vergerio the Elder, humanist (d. 1444 or 1445)
date unknown
Erasmo of Narni, Italian mercenary (d. 1443)
Guarino da Verona, Italian humanist (d. 1460)
John VII Palaiologos, Byzantine Emperor (d. 1408)
King Olav IV of Norway (d. 1387)
Jan Piast, Duke of Ziebice (d. 1428)
Jan Sindel, Polish scientist (d. 1443)
probable
Joanna of Navarre, daughter of Charles II of Navarre (d. 1437)
John Lydgate, English Benedictine monk and poet (d. 1451)
Paulus Vladimiri, Polish scholar (d. 1435)
Duke William of Austria (d. 1406)
May 31 – St Vitalis of Assisi (b. 1295)
November 5 – Casimir III of Poland (b. 1310)
December 19 – Pope Urban V (b. 1310)
date unknown
Vedanta Desika, Hindu poet (b. 1269)
Yang Weizhen, painter (b. c. 1296)
Ukhaantu Khan, Emperor Huizong of Yuan, last emperor of the Yuan Dynasty (b. 1320)
1370 Wikipedia (Text) CC BY-SA