|Covid-19|The Toltecs are deposed at Chichen Itza.
The Almohad caliph, Yaqub al-Mansur, reconquers the city of Gabes Ifriqiya from the Almoravid pretender, Ali b. Ghaniya.
May 1 – Battle of Cresson: Saladin defeats the crusaders.
July 4 – Battle of Hattin: Saladin defeats Guy of Lusignan, King of Jerusalem.
September 20–October 2 – Siege of Jerusalem: Saladin captures Jerusalem.
King Jayavarman VII of Ankor Vat defeats the Cham conquerors.
Ghorin Muhammed conquers Punjab.
October 29 – Pope Gregory VIII issues the bull Audita tremendi, proposing the Third Crusade.
Alexius Branas attempts to seize Constantinople in defiance of his master Isaac II Angelus.
Pillage of Sigtuna. Estonians, Curonians and/or Karelians raid Sigtuna town in Sweden and kill the archbishop Johannes.
Knut Eriksson builds a castle in the island of Stockholm in Sweden.
Genoa takes Bonifacio (in Corsica) from Pisa.
Glanvill, an official of King Henry II, describes how villeins can be free (approximate date).
Florence takes control of the neighboring city of Empoli.
To finance the siege of Zara, the Doge of Venice grants the benefits of the revenue from the salt tax to a consortium of creditors. Pledging the income from the Salt Office becomes a staple of the city's finance.
October 21 – Pope Gregory VIII succeeds Pope Urban III as the 173rd pope.
The Cathedral of St. Jacob is consecrated in Szczecin, Pomerania.
March 29 – Arthur I, Duke of Brittany (d. 1203)
September 5 – King Louis VIII of France (d. 1226)
Vladimir III Rurikovich, Grand Prince of Kiev (d. 1239)
May 1 – Roger de Moulins, Grand Master of the Knights Hospitaller
May 6 – Ruben III, Prince of Armenia (b. 1145)
July 4 – Raynald of Châtillon, Prince of Antioch (b. c. 1125)
September/October – Count Raymond III of Tripoli (b. 1140)
October 20 – Pope Urban III
November 9 – Emperor Gaozong of China (b. 1107)
December 17 – Pope Gregory VIII (b. c. 1100)
Gerard of Cremona, Italian translator of scientific works (b. c. 1114)
1187 Is the name of a modification to Half-Life 2 that was released in 2010.
Year 1187 (MCLXXXVII) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar.