Deaths on October 6

Engelbert III, Margrave of Istria

Engelbert III (died 6 October 1173), a member of the Rhenish Franconian House of Sponheim, was Margrave of Istria from 1124 until his death.

9 Aug

Cathedral of Pisa
Construction of the campanile of the Cathedral of Pisa (now known as the Leaning Tower of Pisa) begins; it will take two centuries to complete.