Given to the Greek state by the family of former Prime Minister Koryzis in 1941, the museum was built in the 1960s at the site of the old Koryzis residence. Exhibited objects date from the Mycenaean Era to the earliest centuries of Christianity.

Retrieved from excavations throughout Troezen and Ermioni, the collections include sculptures, inscriptions and important architectural discoveries.

The plaster copy of a 480 BC column from Troezen, bearing Themistocles’ appeal to Greeks to resist the Persian invaders, is the museum’s most famous artefact. Visitors hoping to see the original will have to visit the Epigraphic Museum of Athens.