Year 1304 (MCCanCIV) was a leap year starting on Wednesday (link will display the full calendar) of the Julian calendar.
February – John "Red" Comyn, Lord of Badenoch, negotiates a peace with the Kingdom of England in the Wars of Scottish Independence at Strathord near Perth.
July 20 – Fall of Stirling Castle: Edward I of England takes the last rebel stronghold in the Wars of Scottish Independence.
August 17 – The Battle of Mons-en-Pévèle is fought to a draw between the French army and the Flemish militias.
October 24 – Sasa Bey of the Beylik of Menteşe conquers Ephesus from the Eastern Roman Empire, massacring and deporting its native population
James II of Aragon reconquers Villena, Spain.
Holland and Zeeland are occupied by John II, Duke of Brabant and Guy of Dampierre. John II, Count of Hainaut recovers the counties.
Ala-ud-din Khilji, Sultan of Delhi, conquers Gujarat.
The peace treaty signed between the khanates of the Mongol Empire and ends the civil war of the Mongols.
The Genoese Benedetto I Zaccaria takes control of Chios island from the Byzantine Empire, establishing an autonomous lordship there.
Construction of Ypres Cloth Hall is completed.
February 24 – Ibn Battuta, Moroccan jurist
July 20 – Petrarch, Italian poet (d. 1374)
William de Clinton, 1st Earl of Huntingdon
Louis I of Flanders (d. 1346)
Jayaatu Khan, emperor of the Yuan Dynasty (d. 1332)
Günther von Schwarzburg, German king (d. 1349)
March 7 or March 8 – Bartolomeo I della Scala
May 11 – Mahmud Ghazan, Mongol ruler (b. 1271)
May 23 – Jehan de Lescurel, poet and composer
July 7 – Pope Benedict XI (b. 1240)
July 17 – Edmund Mortimer, 2nd Baron Wigmore
August 17 – Emperor Go-Fukakusa of Japan (b. 1243)
August 22 – John II, Count of Hainaut (b. 1247)
September – John de Warenne, 6th Earl of Surrey, English soldier
1304 Wikipedia (Text) CC BY-SA