Great fire of Hamburg
The Great fire of Hamburg began early on May 5, 1842, in Deichstraße and burned until the morning of May 8, destroying about one third of the buildings in the Altstadt. It killed 51 people and destroyed 1,700 residences and several important public buildings, necessitating major civic rebuilding and prompting infrastructure improvements. The heavy demand on insurance companies led to the establishment of reinsurance.