Sifnos’ Archaeological museum is located in the medieval settlement of Kastros roofed under a traditional building.
It hosts findings from excavations in the island. It has collections of sculptures, pottery and coins.
The sculptures are from the archaic to roman times. From these exhibits distinguish the statues, the sepulchral steles and the architectonic parts. Pottery is from excavations in village Kastros and date back from geometric to hellenistic times.