1380

The earliest surviving map of Venice, from a 1380 codex of Paolino Veneto.

Year 1380 (MCCCLXXX) was a leap year starting on Sunday of the Julian calendar.

Events

January–December

• February – Olaf II of Denmark also becomes Olaf IV of Norway, with his mother Margrete (Margaret) as regent. Iceland and the Faroe Islands, as parts of Norway, pass under the Danish crown.<ref>Bjørkvik, Halvard; Opsahl, Erik: Håkon 6. Magnusson i Store norske leksikon på snl.no. Henta 3. november 2025 frå https://snl.no/H%C3%A5kon_6._Magnusson</ref>
• March 13 – The southern England town of Winchelsea in East Sussex is attacked and burned by an expeditionary force from France for a second time.<ref name=Fires>"Fires, Great", in The Insurance Cyclopeadia: Being an Historical Treasury of Events and Circumstances Connected with the Origin and Progress of Insurance, Cornelius Walford, ed. (C. and E. Layton, 1876) p27</ref>
• May 31 – Grand Duke of Lithuania Jogaila signs the secret Treaty of Dovydiškės, with the Teutonic Knights. This sparks a civil war with his uncle Kęstutis.<ref>Kiaupa, Zigmantas; Jūratė Kiaupienė; Albinas Kuncevičius (2000) [1995]. The History of Lithuania Before 1795 (in Lithuanian) (English ed.). Vilnius: Lithuanian Institute of History. pp. 124–126. Template:ISBN.</ref>
• June 21 – Battle of Chioggia: the Venetian fleet defeats the Genoese.<ref>Lane, Frederic C. VENICE, A MARITIME REPUBLIC. N.p.: Johns Hopkins UP, 1973. p. 192-196 Print.</ref>
• September 8 – Battle of Kulikovo: Russian forces under Grand Prince Dmitry Donskoy of Moscow resist a large invasion by the Blue Horde, Lithuania and Ryazan, stopping their advance.<ref>Kirpichnikov 1980, pp. 100–104.</ref><ref>Timofeychev, A. (2017-07-19). "The Battle of Kulikovo: When the Russian Nation Was Born". Russia Beyond the Headlines. Retrieved 2025-10-03.</ref>
• September 16 – Charles V of France is succeeded by his twelve-year-old son, Charles VI.<ref>Sumption 2009, p. 397.</ref>
• October 2 – Caterina Visconti marries her first cousin, Gian Galeazzo Visconti, later Duke of Milan, at the Church of San Giovanni in Conca.<ref>Hoeniger, Cathleen (2006). "The Illuminated "Tacuinum sanitatis" Manuscripts from Northern Italy ca. 1380-1400: Sources, Patrons, and the Creation of a New Pictorial Genre". In Givens, Jean Ann; Reeds, Karen; Touwaide, Alain (eds.). Visualizing Medieval Medicine and Natural History, 1200-1550. Ashgate Publishing. pp. 51–82.</ref>
• November 3 – Charles VI of France, who succeeded his father (Charles V of France) in September, is crowned.<ref>Sumption 2009, p. 397.</ref>

Date unknown

• Sir William Walworth, a member of the Fishmongers Guild, becomes Lord Mayor of London for the second time.
• Khan Tokhtamysh of the White Horde dethrones Mamai of the Blue Horde. The two hordes unite to form the Golden Horde.<ref>Howorth 1880: 216, 226; Grousset 1970: 407, 436; Seleznëv 2009: 182–183; Počekaev 2010: 160–161.</ref>
• Karim Al-Makhdum arrives in Jolo, and builds a mosque.
• The Hongwu Emperor purges the chancellor of China, Hu Weiyong, and abolishes that office, as he imposes direct imperial rule over the six ministries of central government, for the Ming Empire.
• The last islands of Polynesia are discovered and inhabited.
• The Companhia das Naus is founded by King Ferdinand I of Portugal.<ref>Lopes, Fernão (1380–1460). Chronica de el-rei D. Fernando (vol. II) (PDF) (in Portuguese). Escriptorio, 147 - Rua dos Retrozeiros, Lisbon.</ref>
• The imposter Paul Palaiologos Tagaris, having been appointed Latin Patriarch of Constantinople by Pope Urban VI, takes up residence in his see at Chalcis.

Births

• February 11 – Gian Francesco Poggio Bracciolini, Italian humanist (d. 1459)<ref>Date in Cav. Toneilli's ms Elogi delli uomini illustri Toscani, noted by William Shepherd, The Life of Poggio Bracciolini</ref>
• September 8 – Saint Bernardino of Siena, Italian Franciscan missionary (d. 1444)<ref>Mormando 1999, pp. 25–45.</ref>
• November 27 – King Ferdinand I of Aragon (d. 1416)
• date unknown
  • Abd al-Rahman ibn Muhammad al-Bistami, Ottoman Sufi (d. 1455)
  • Giovanni Berardi, Archbishop of Tarentum (d. 1449)
  • Nguyễn Trãi, Confucian scholar (d. 1442)
  • Anne de Bourbon, French noble (d. 1408)
  • Jan Želivský, Hussite priest (d. 1422)
• probable
  • Huitzilihuitl II, 2nd Tlatoani (king) of Tenochtitlan (modern Mexico City), 1396–1417, father of Moctezuma I (d. c. 1417)<ref>Template:Cite web</ref>
  • Jamshīd al-Kāshī, Persian astronomer and mathematician (d. 1429)
  • King Lukeni lua Nimi of the Kingdom of Kongo (d. 1420)
  • Thomas à Kempis, German monk and writer (d. 1471)
  • Parameshvara, Indian mathematician (d. 1425)

Deaths

• April 29 – Saint Catherine of Siena, Italian theologian (b. 1347)<ref>Caffarini, Tommaso (1974). Libellus de supplemento: legende prolixe virginis beate Catherine de Senis.</ref>
• May 5 – Saint Philotheos, Coptic martyr
• July 13 – Bertrand du Guesclin, Constable of France (b. c. 1320)
• July 26 – Emperor Kōmyō, former Emperor of Japan (b. 1322)
• September 16 – King Charles V of France (b. 1338)<ref>Template:Cite web</ref>
• December 29 – Elizabeth of Poland, queen consort of Hungary (b. 1305)
• date unknown
  • Haakon VI of Norway (b. 1340)
  • Nissim of Gerona, Catalan rabbi (b. 1320)
  • Khadijah of the Maldives, sovereign sultan of the Maldives
  • Shams al-Dīn Abū Abd Allāh al-Khalīlī, Syrian astronomer (b. 1320)