1175

Events

King Henry II begins living openly with his mistress Rosamund Clifford, raising suspicions about their relationship and alienating Henry's wife, Queen Eleanor of Aquitaine.
Eleanor of Aquitaine is held under house arrest at Old Sarum Castle in Wiltshire. She is kept in comfort there – fine clothes for her are dispatched regularly from London.
Treaty of Windsor: High King Ruaidrí Ua Conchobair relinquishes his title and agrees to submit to Henry II as vassal of Connacht in Ireland.
Winter - The Massacre of Abergavenny ends with several Welsh noblemen dead, at the orders of Lord William de Braose.
Europe
Under the admirals of the clan Banu Mardanish, an Almohad fleet suffers a large defeat at the hand of the Portuguese, as they are trying to re-conquer Lisbon.
Vordingborg Castle is completed by King Valdemar I of Denmark as a defensive fortress.
The University of Modena and Reggio Emilia in Italy is founded.
Levant
May 22 - A group of Isma'ili Assassins gains access into Saladin's camp and attempts to kill him during the siege of Aleppo. But his bodyguard saves his life, the others are slain while trying to escape.
Asia
The Chinese court establishes several government-paper money factories in the cities of Chengdu, Hangzhou and Huizhou. In Hangzhou alone a daily workforce of more than 1,000 men is employed.
The Namayan Kingdom formed by a confederation of barangays, reaches its peak on Luzon.
By topic

The High Academy of the Bosnian Church in Moštre, is first mentioned in the Vatican archives.
Count Raymond of Tripoli appoints William II as chancellor of Jerusalem and is elected as archbishop of Tyre.