Chlemoutsi Castle (Κάστρο Χλεμούτσ) was founded in 1220-1223 by the ruler Godefridus I Villehardouin and was the strongest fortress of the Frankish principality of Achaia. Originally the castle was called “Château Clermont”, travellers referred to this incredible structure as “Castle Tornese” and the Byzantines called it “Chloumoutzi”.

Built in a strategic position, with an extensive view of the plain of Ilia and the Ionian Sea, it protected the capital Andravida, the important harbour of Glarenza and the palace of the house of Villehardouin within the walls of the castle. The castle was equipped with a double fortification. The central part of the castle, which stands at the hilltop, was a two-storey hexagonal structure and housed the princely palace. The halls were arranged around a central courtyard.

Chlemoutsi castle began to lose its important role in the defence of the region as early as the end of the Frankish occupation. In 1701 Grimani proposed its destruction. Its location did not serve the interests of the Venetians, which were related to the sea, and the already old castle required extensive work to repair and modernise it. Chlemoutsi remained in Turkish possession until the Greek War of Indepence of 1821.

Chlemoutsi Castle still retains its strong Frankish character and remains one of the most important and best preserved fortresses in Greece and is an excellent example of the fortress architecture of the Frankish era in the Peloponnese.

Nowadays some of the restored halls of the castle house a museum with about 500 objects on display (PiP5).