The museum was founded in 1960 in order for it to house antiquities which until then were kept in the cells of the Katapoliani monastery.
The museum contains the following collections:
Hall A: Sculptures of the Ancient and Classical Periods.
Hall B: Small ceramic and sculpted artifacts dating from the Neolithic, Proto-Cycladic, Mycenaean, Geometric, Archaic, Classical, Hellenistic, and Roman periods.
Atrium: Sculptures, architectural elements, internment urns/sarcophagi and mosaic floor from the Roman Period