Year 1327 (MCCCXXVII) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar.
January 25 – The 14-year-old Edward III is proclaimed King of England after his mother Isabella has engineered the abdication of his imprisoned father Edward II of England on January 20. Isabella and her lover Roger Mortimer rule as regents. (Coronation February 1.)
April 6 (Good Friday) – Tuscan writer Petrarch sees a woman he names Laura in the church of Sainte-Claire d'Avignon, which awakes in him a lasting passion. He writes a series of sonnets and other poems in Italian dedicated to her, which are collected into Il Canzoniere, an influential model for Renaissance culture.
June 14 – Peace treaty between Norway and Sønderjylland.
June 21 – Ingeborg of Norway marries her lover Knud Porse but is deposed from political power in Norway.
November – Alfonso IV of Aragon begins his reign.
English abbot Richard of Wallingford describes the construction of an astronomical clock in his Tractatus Horologii Astronomici.
June – Malatesta Ungaro, condottiero (d. 1372)
October 30 – Andrew, Duke of Calabria (d. 1345)
date unknown
Charles de La Cerda, Franco-Spanish soldier (d. 1354)
Demetrius I Starshy, Prince of Trubczewsk (d. 1399)
Birger Gregersson, Archbishop of Uppsala (d. 1383)
Baldus de Ubaldis, Italian jurist (d. 1400)
probable – William Douglas, 1st Earl of Douglas, Scottish nobleman (d. 1384)
January 16 – Nikephoros Choumnos, Byzantine scholar and statesman (b. 1250 or 1255)
January 29 – Adolf, Count Palatine of the Rhine (b. 1300)
March 15 – Albert of Schwarzburg, grand preceptor of the Knights Hospitaller
May 29 – Jens Grand, Danish archbishop (b. c. 1260)
July 4 – Stefano Visconti, Milanese nobleman
August 16 – Saint Roch, French saint
August 25 – Demasq Kaja, Chobanid
September 1 – Foulques de Villaret, Grand Master of the Knights Hospitaller
September 21 – King Edward II of England (murdered; b. 1284)
September 26 – Cecco d'Ascoli, Italian encyclopaedist, physician and poet (b. 1257)
October 27 – Elizabeth de Burgh, queen of Robert the Bruce
November – Chupan, Chobanid prince of the Ilkhanate
November 2 or November 5 – King James II of Aragon (b. 1267)
December 19 – Agnes of France, Duchess of Burgundy
date unknown
Thomas Cobham, Bishop of Worcester
Constantine I of Imereti
David of Hrodna, Lithuanian military leader
Vital du Four, French theologian (b. 1260)
Walter Reynolds, Archbishop of Canterbury
Sir Richard de Exeter, Anglo-Irish knight
probable – Bartholomew of Lucca, Italian historian
The action of Umberto Eco's novel The Name of the Rose (Il Nome della Rosa, 1980) takes place during this year.
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