The Archaeological Museum of Thebes, reopened in 2016 after a substantial renovation, is one of the better regional museums in mainland Greece. It occupies a purpose-built building on the Cadmea — the ancient citadel — and the collection spans Prehistoric, Mycenaean, Geometric, Archaic, Classical, and Hellenistic periods, all from the Boeotian region.
Highlights include a remarkable collection of Mycenaean painted larnakes (clay coffins), a Linear B tablet archive from the palace complex beneath the modern town, fine Tanagra terracotta figurines, and grave goods from the ancient necropolis. The presentation is clear and well-labelled in Greek and English. This museum alone justifies a stop in Thiva; it takes about 90 minutes to do it properly.