|Centuries:||13th century – 14th century – 15th century|
|Decades:||1340s 1350s 1360s – 1370s – 1380s 1390s 1400s|
|Years:||1370 1371 1372 – 1373 – 1374 1375 1376|
- 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.
- 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 hands over the rule of Achaea (now southern Greece) to his cousin, Joanna 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.
- 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