Sifnos is home to three museums which expose the life and history of the island from the Mycenaean times to modern times. The only one that can be found in Apollonia is the Folklore Museum which guards the folklore tradition of Sifnos. It lies at the central square and includes various items used in the daily life of the locals, like agricultural tools, traditional costumes, and others. The main exhibits are swords, old dresses, embroidery, carved objects, and kitchen vessels.
In Kastro Sifnos, there is a small Archaeological Museum. This museum houses a fascinating collection of exhibits from excavations on the island. The list includes marble heads, particularly a nice head of Kouros, remains of buildings and sanctuaries and some Hellenistic sculptures. Close to Exabela village is the Monastery of Panagia Vrysiani. Within its premises, you will see a small ecclesiastical museum with rare books and Byzantine icons.
The Folklore and Popular Art Museum of Sifnos is located in the center of Apollonia, the capital of Sifnos. It hosts exhibits from the traditional life on the island, such as folk costumes, furniture, weapon, agricultural tools, and photographs.
A small ecclesiastical museum is housed in the Monastery of Panagia Vrysiani, in close distance to Exabela. The museum exhibits clothes of priests, rare books and manuscripts, a gospel of the 18th century and Byzantine icons.