Among the interesting monuments of LOCATION@1 are the 13th century castle of the Prince of LOCATION@2 -LRB- currently used as a museum -RRB- , two old churches , the PERSON@1 -LRB- ORGANIZATION@1 ' Tower -RRB- and preserved fragments of city walls .

Sites The most interesting monuments of LOCATION@1 are prince of LOCATION@2 's castle from the 13th century -LRB- currently used as a museum -RRB- , two old churches , PERSON@1 -LRB- ORGANIZATION@1 ' Tower -RRB- and preserved fragments of city walls .
