The Museum of the Chlemoutsi Castle is housed in the inner courtyard of the homonymous archaeological site, in the Municipality of Kastro – Kyllini, Elis, completing the museum and archaeological map of the area. It is an original cultural idea, as it develops in such a way to be an “open museum”, where the shell of the museum is also its most important exhibit. The permanent exhibition of the museum, titled “The Knights’ Season – The Crusaders of Morea”, includes more than 500 objects, dating from the 13^th to the 15^th century A.D. It focuses on the interesting and critical historical period of the Frankish Principality of Achaea, while presenting the culture of a charming period, that of the Knights Templar, as it was developed in the southern land of Greece.

The aim of the museum is to promote the rich archaeological reserve from the period of Frankish rule, which is almost exclusively a product of excavation and comes from medieval places mainly of the prefecture of Elis and more widely the territories of the Principality (Patra, Corinth). The creation of a museum about the Franks within the castle itself aims at the global projection of the medieval world in Greece through the shell (castle) and the content (museum exhibits), as the visitor will have the chance to see the exhibits in their natural environment.  

At the same time, the museum has an archaeological office with a study area, an archaeological storeroom, as well as a modern workshop for the preservation of ceramics, coins, stone, murals, metal and glass objects.