Year 1355 was a common year starting on Thursday (link will display the full calendar) of the Julian calendar.

Events of 1355

• 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 of Anjou marries Mary of Naples, daughter of Charles of Valois, 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.
• September 1 - Tvrtko I writes in castro nostro Vizoka vocatum from old town Visoki.

• A small Scottish and French force invades Northumberland, loots the city of Berwick-upon-Tweed and defeats a small English force in a skirmish at Nisbet, Berwickshire.

Births

• 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

Deaths

• January 7 - Inês de Castro, lover of King Peter I of Portugal (b. 1325) (murdered)
• April 18 - Doge Marin Falier, Italian ruler (executed)
• 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 Dusan, Emperor of Serbia

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