The most important monuments and architectural complexes are:
The Counsellors' residence. It is formed of a ground floor and a first floor with large rooms. It was an imposing building, and served during the ottoman occupation, as an official residence. The Italian Remaissance palaces served probably as the model for its construction.
The Rector' s residence. It was an imposing complex. Today in ruins. The Cathedral. It was founded in 1583 and dedicated to St Nicolas. During the Ottoman occupation, it was laid waste and turned into a mosque of Sultan Ibrahim. It is a large square room with a cupola. The only remnants of it are the minaret' s base and the mihrab.
Gunpownder-shorehouses. Inside the fortress there are two gunpowder-storehouses: They are rectangular buildings with vault and air-locks. The walls are thick with small doors and extra rooms for better safety.
Ammunition-storehouse. The ground floor and the first floor are covered with vaults. Over the entrance of the ground floor there is an arched lintel. Three pillars supported the wooden floor of the first floor; there, several parts of guns were stored.
Possible Bishop' s Mansion. It is formed of two buildings: The larger, is a unified room covered with vaults, while the smaller is a latter addition. It is considered as the Bishop' s Mansion because of the Cathedral near by.