The castle Weißensee - also called Runneburg - is considered one of the most important Romanesque secular buildings in Germany. Its origins go back to the year 1168 and to the Thuringian landgrave Jutta. At strategically important place and halfway between the western center of control around the Wartburg and the eastern territory around the Neuchâtel at Freyburg on the Unstrut Weißensee was in the subsequent period to a main base landgräflicher territorial policy. The dominant feature of the castle development is the high medieval complex of five-storey palace tower, palas and curtain wall.