The Astypalaia Archaeological Museum opened ιn 1998 and it is housed in a one-story small room in Pera Gialos. The few but extremely interesting exhibits displayed there are dated from the second millennium B.C. up to the Early Christian Ages and they include pottery, bronze tools, copper weapons, jewelery, etc. The mosaic floor of the Christian ages with the zodiac circle and the seasons of the year is most impressive.