Year 1355 (MCCCLV) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar.
January 7 – Portuguese king Afonso IV sends three men to kill Ines de Castro, beloved of his son prince Pedro – Pedro revolts and incites a civil war.
February 10 – The St. Scholastica's Day riot broke out in Oxford, England, leaving 63 scholars and perhaps 30 locals dead in two days.
April – Philip II of Taranto marries Maria of Calabria, daughter of Charles, Duke of Calabria, and Mary of Valois.
April 5 – Charles IV is crowned emperor in Rome.
April 18 – In Venice, the Council of Ten beheads Doge Marin Falier for conspiring to kill them.
August – Battle of Nesbit Moor: Scottish army decisively defeats the English.
September 1 – Tvrtko I writes in castro nostro Vizoka vocatum from old town Visoki.
Ottoman Turks defeat Bulgarian Empire in the Battle of Ihtiman.
January 7 – Thomas of Woodstock, 1st Duke of Gloucester, son of King Edward III of England (d. 1397)
August 16 – Philippa Plantagenet, Countess of Ulster
probable
Manuel Chrysoloras, Byzantine humanist (d. 1415)
Konrad von Jungingen, 25th Grand Master of the Teutonic Order
Gemistus Pletho, Greek scholar
Foelke Kampana, Frisian lady and regent (d. 1418)
January 7 – Inês de Castro, lover of King Peter I of Portugal (murdered; b. 1325)
April 17 – Marin Falier, Doge of Venice (b. 1285)
August 3 – Bartholomew de Burghersh, 1st Baron Burghersh
October 16 – Louis of Sicily
December 5 – John III, Duke of Brabant (b. 1300)
December 20 – Stefan Uroš IV Dušan, Emperor of Serbia
1355 Wikipedia (Text) CC BY-SA