1151 CE

Confronted with internal strife, the commune of Bologna is the first Italian republic to turn to the rule of a podestà, Guido di Ranieri da Sasso (it ends in 1155). Anping Bridge is completed in China's Fujian province. Its total length will not be exceeded until 1846. The first plague and fire insurance policy is issued in Iceland.

In the 1150s, the 12th century.

Geopolitics & Diplomacy

  • Confronted with internal strife, the commune of Bologna is the first Italian republic to turn to the rule of a podestà, Guido di Ranieri da Sasso (it ends in 1155).source

Conflict & Security

  • After the Battle of Ghazni, the city is burned by the Prince of Ghur.source

Religion & Belief

  • Bolton Abbey is founded in North Yorkshire, England.source

Technology & Infrastructure

  • Anping Bridge is completed in China's Fujian province. Its total length will not be exceeded until 1846.source

Health & Medicine

  • The first plague and fire insurance policy is issued in Iceland.source

Births

  • April 3 – Igor Svyatoslavich, Russian prince (died 1202)source
  • May 9 – al-Adid, last Fatimid caliph (died 1171)source
  • Unkei, Japanese sculptor (died 1223)source

Deaths