The earliest Austrian walled towns started to appear in the late 11th century to the early 13th century. Their establishment was closely connected with the development of Austria as a march of the Holy Roman Empire and in particular by the Hohenstaufen emperors and their Marcher Lords, the Babenbergs. In present-day Austria, there are 106 towns or cities that were walled. The walls of Radstadt, Freiburg, Hainburg and Drosendorf survive almost intact, and Austria has some of the most impressive walled towns in Europe.