Year 1355 (MCCCLV) was a common year starting on Thursday of the Julian calendar.
Events
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- January 6 – Charles IV of Bohemia is crowned with the Iron Crown of Lombardy as King of Italy in Milan.
- January 7 – King Afonso IV of Portugal sends three men who kill Inês de Castro, mistress of his son Pedro, who revolts and incites a civil war.
- February 10 – St Scholastica Day riot in Oxford, England, breaks out, leaving 63 scholars and perhaps 30 locals dead in two days.
- March 16 – Red Turban Rebellions: Han Lin'er, a claimed descendant of Emperor Huizong of Song, is proclaimed emperor of the restored Song dynasty in Bozhou.
- April – Philip II, Prince of Taranto, marries Maria of Calabria, daughter of Charles, Duke of Calabria, and Marie of Valois.
- April 5 – Charles IV is crowned Holy Roman Emperor in Rome.
- April 18 – In Venice, the Council of Ten beheads Doge Marin Falier, for conspiring to kill them.
- May – Red Turban Rebellions: Guo Zixing dies, leaving his forces to the command of his son-in-law, Zhu Yuanzhang. Guo's successors are later killed in battle while trying to capture Nanjing.
- September 1 – The old town of Visoki is first mentioned in Tvrtko I of Bosnia's charter in castro nostro Vizoka vocatum.
- October 5–December 2 – Hundred Years' War: Black Prince's chevauchée of 1355 – A large mounted Anglo-Gascon force under the command of Edward the Black Prince marches from Bordeaux in English-held Gascony 300 miles (480 km) south to Narbonne and back, devastating a wide swathe of French territory.
- Date unknown – Battle of Ihtiman: The Ottoman Turks defeat the Bulgarian Empire but suffer heavy losses and do not return to Bulgarian territory for around 15 years.
Births
- January 7 – Thomas of Woodstock, Duke of Gloucester, son of King Edward III of England (d. 1397)
- August 16 – Philippa Plantagenet, Countess of Ulster (d. 1382)
- October 10 – Zhu Biao, eldest son of the Hongwu Emperor and crown prince of the Ming dynasty (d. 1392)
- probable
- Acamapichtli, 1st tlatoani (monarch) of Tenochtitlan (modern Mexico City), 1375-1395 (d. 1395)
- Manuel Chrysoloras, Byzantine humanist (d. 1415)
- Konrad von Jungingen, German 25th Grand Master of the Teutonic Order
- Gemistus Pletho, Greek scholar
- Foelke Kampana, Frisian lady and regent (d. 1418)
- Mircea the Elder, Voivode of Wallachia (d. 1418)
Deaths
- January 7 – Inês de Castro, lover of King Peter I of Portugal (murdered) (b. 1325)
- April 17 – Marin Falier, Doge of Venice (b. 1285)
- April 22 – Eleanor of Woodstock, countess regent of Guelders, eldest daughter of King Edward II of England (b. 1318)
- May – Guo Zixing, Chinese Red Turban rebel leader