Neubrandenburg is a city in the Mecklenburg-Vorpommern region of northeastern Germany. It is situated on the Tollensesee, about 60 km (37 mi) north of Rostock and 100 km (62 mi) east of Berlin. The city was founded in the 12th century as a Slavic settlement and received its town charter in 1248. The town was sacked by the Mongols in 1263, and was repeatedly damaged by fires, most notably in 1575. In 1709, the town was destroyed by a Swedish army during the Great Northern War. Neubrandenburg was rebuilt after the war and became part of the Prussian Province of Brandenburg in 1815. It was annexed by the German Reich in 1938 and was part of East Germany from 1949 to 1990. After German reunification in 1990, Neubrandenburg became part of the state of Mecklenburg-Vorpommern.