1102

By place

Levant

• Spring - A Fatimid expeditionary force invades Palestine and launches attacks into the Kingdom of Jerusalem. The Crusaders defeat a Fatimid rearguard near Ascalon, and capture the city after a 3-year siege. The Crusaders capture Caesarea Maritima with support of the Genoese fleet. A number of Genoese trading colonies are established along the Mediterranean coast.
• Siege of Tripoli: The Crusaders under Raymond IV begin the siege of Tripoli. The garrison calls for assistance, but a Seljuk relief army from Damascus and Homs is defeated by Raymond.
• May 17 - Battle of Ramla: The Crusaders under King Baldwin I are defeated by the Fatimid army at Ramla. Baldwin and his companions escape through the enemy lines to Arsuf.
• May 27 - The Crusaders under Baldwin I break their way out of Jaffa, which is encircled by the Fatimid Army. A charge of the French cavalry breaks the enemy's ranks, and forces them to retreat to Ascalon.
• Raymond IV is imprisoned by Tancred, nephew of Bohemond I, and regent of the Principality of Antioch.
• Dagobert of Pisa is briefly deposed as Patriarch of Jerusalem.
• The Venetians establish a new trade emporium in Sidon.

  Europe

• May 5 - The short-lived principality created by Rodrigo Diaz de Vivar ends: Valencia is captured by Almoravid forces under Sultan Yusuf ibn Tashfin. It is later recaptured, evacuated and burned by King Alfonso VI.
• June 4 - Władysław I Herman, duke of Poland, dies at Płock after a 23-year reign. He leaves the succession to be disputed between his sons Zbigniew and Bolesław III Wrymouth.
• The Pacta Conventa formed by the Croatian nobility, recognize King Coloman as their overlord, initiating the personal union between the two kingdoms. Coloman is crowned king of Croatia.

  England

• King Henry I captures Arundel Castle after having besieged Earl Robert of Bellême. Robert loses his English lands and is banished to Normandy.

  By topic

Religion

• Council of London: A church council convened by Anselm, archbishop of Canterbury, bans sodomy and the sale of Christian slaves to non-Christian countries, and reforms the clergy.
• Henry I orders the tomb of Edward the Confessor be opened; the body of the former king is supposedly found undecayed. The Westminster monks start to claim Edward as a saint.