1143 in Europe

Priozersk (; ; ) is a town and the administrative center of Priozersky District in Leningrad Oblast, Russia, located at the northwestern shore of Lake Ladoga, at the estuary of the northern armlet of the Vuoksi River on the Karelian Isthmus. It is served by a station of the same name on the St. Petersburg—Khiytola railway. Population:

summit between Portugal and the Kingdom of León, between October 4-5, 1143

1143 election of the Catholic pope