The Archaeological museum of Kos is located at Eleftherias square, in a neoclassical building, designed in 1935. Excavations brought to light findings by the beginning of the century, mainly from the archaeological site of the Market and also from monuments, such as, the Altar of Dionisos, the Odeon and the Roman Residence.

The most impressive exhibits include beautiful mosaics, statues from the ancient site of Asklepeion, an extensive collection of prehistoric pottery and metallic objects.