 Complete the following phrase:  In 136566 and 138485 the town served as a refuge for the Bishop of Constance when he was expelled from the Constance. Before 1324 and between 137186 the city was pawned to outside owners as collateral for a loan. From 1359 to 1403 the castle was owned by the locals. In 1374 they were granted an exemption of the war tax. The episcopal rule was weakened by the transition of sovereignty from the Habsburg to the County of Baden in 1415. Due to its location on the religious boundary Kaiserstuhl presented an important bridgehead for the Catholic regions. In both the 