Freiburg is a medival town founded by the Dukes of Zähringen. Its historical development was especially influenced by its more than 400-year-long association with the Habsburg Dynasty. The city developed from a walled middle-ages market town to a fort city in the 17th/18th century to the present-day modern city of about 200,000 inhabitants. After being badly damaged during the Second World War, the city centre was rebuilt using the layout of the middle-ages city observing traditional urban planning.