By the Imperial Palace remains you will see Casimir Hall, what remains of a renaissance castle. Count Johann Casimir moved to Kaiserslautern in 1570 and his castle built on this historic site. While it was constructed, he lived in the Imperial Palace, which obviously was in good enough condition for the Count. His castle was destroyed in 1703, partly rebuilt to accommodate offices and homes, then reduced to foundations having been sold in 1813. It was once a museum but is now closed to the public and only used for civic receptions.