The Archaeological Museum of Istria, housed in a 19th-century building adjacent to the Twin Gate, holds the most significant collection of Roman and pre-Roman finds from the Pula area. The highlights include floor mosaics from Roman villas, a collection of Greek and Roman ceramics, and inscribed stone monuments that document the civic and religious life of ancient Pola (the Roman name for Pula).
The garden surrounding the museum is one of Pula's pleasant surprises — stone sculpture and architectural fragments arranged among trees, freely accessible. The collection inside covers prehistory through to the early medieval period. Worth an hour if you want to understand the layers of history you are walking through in the rest of the old town.