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Year 1373 (MCCCLXXIII) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar.

Events[link]

January–December[link]

• March 24 – The Treaty of Santarém is signed between D. Fernando of Portugal and Henrique II of Castile, ending the second war between the two countries.
• May 13 – Julian of Norwich receives the sixteen Revelations of Divine Love.

Date unknown[link]

• Bristol is made an independent county.
• The Anglo-Portuguese alliance is signed (currently the oldest active treaty in the world).
• The city of Phnom Penh (now the capital city of Cambodia) is founded.
• Philip II of Taranto & Achaea hand over the rule of Achaea (now southern Greece) to his cousin Joan I of Naples.
• Leo VI succeeds his distant cousin, Constantine VI, as King of Armenian Cilicia (now southern Turkey).
• A city wall is built around Lisbon, Portugal to resist invasion by Castile.
• Tran Kinh succeeds Tran Phu as King of Vietnam.
• Byzantine co-emperor Andronikos IV Palaiologos rebels against his father, John V Palaiologos, for agreeing to let Constantinople become a vassal of the Ottoman Empire. After the rebellion fails, Ottoman Emperor Murad I commands John V Palaiologos to blind his son.
• The death of Sultan Muhammad as-Said begins a period of political instability in Morocco.
• Merton College Library is built in Oxford, England.
• The Adina Mosque is built in Bengal.
• The Chinese emperor of the Ming Dynasty, the Hongwu Emperor, suspends the traditional civil service examination system after complaining that the 120 new jinshi degree-holders are too incompetent to hold office; he instead relies solely upon a system of recommendations until the civil service exams are reinstated in 1384.

Births[link]

• March 29 – Marie of Alencon, French princess (d. 1417)
• June 23 – Queen Joan II of Naples (d. 1435)
• September 22 – Thomas le Despenser, 1st Earl of Gloucester (d. 1400)
• date unknown
  • Edward of Norwich, 2nd Duke of York (d. 1415)
  • Margery Kempe, writer of the first autobiography in English

Deaths[link]

• January 16 – Humphrey de Bohun, 7th Earl of Hereford (b. 1342)
• February – Ibn Kathir, Islamic scholar (b. 1301)
• July 23 – Saint Birgitta, Swedish saint (b. 1303)
• November 3 – Jeanne de Valois, Queen of Navarre (b. 1343)
• December 7 – Rafał z Tarnowa, Polish nobleman (b. c. 1330)
• date unknown
  • Constantine VI of Armenia (assassinated)
  • Robert le Coq, French bishop and councillor

References[link]