Emmanouil Benaki st., to the northwest side of the City Hall tel. 22810-88487. Open daily 8:30 to 15:00, Monday closed, admission free.
This small museum is the oldest of the Cyclades. In the three halls are exhibited findings, such as inscriptions and tombstones from the Neolithic, Hellenistic and Roman times. The most interesting collection is that of the first findings from Chalandriani and the castle and other Cycladic islands. You will also see an Egyptian statuette of priest Anchapis, made of black granite of the 22nd Dynasty (730 BC).