The growth of the municipal economy was repeatedly interrupted by disasters like the great fire of 1586 in which 84 houses were destroyed, or the plague of 1611 and 1635. The plague of 1611 killed 226 people, about one third of the population. The typhoid epidemic of 1813–14 killed about 3,000 people in and around the town, especially soldiers of the allies against Napoleon, who were passing through. They were buried in a mass grave at the Imperial Cemetery north of the town.