Akko/Acre/Ptolomais has been occupied by Greeks, Romans, Persians and Egyptians, as well as the Phoenecians, the Crusaders, the Ottomans and the British.
Under the Ottomans the city achieved notoriety as a prison city; amongst its notable prisoners was Bahau'llah, founder of the Baha'i Faith. The British continued the tradition by incarcerating and executing a number of notorius Jewish 'terrorists'. The prison museum is open to visitors.
Less traumatic to visit are the Ottoman inns or khans. In these inns merchants from all over the Mediterranean area came to conduct trade.