Casa del Bicentenario, Roman residential building in Archaeological Park of Herculaneum, Italy.

Casa del Bicentenario is a Roman residential building in the archaeological site of Herculaneum arranged with multiple rooms around a central atrium. The structure features marble floors, detailed wall paintings, and remains of an upper floor containing additional living quarters.

Archaeological excavations led by Amedeo Maiuri uncovered this residence in 1938, marking 200 years since systematic investigations of Herculaneum first began. This discovery represented an important milestone in understanding the buried Roman site.

The name marks the find: the house was excavated exactly two hundred years after the first explorations of Herculaneum began. Inside, look for the carbonised sliding door of the right ala, a two-leaf folding door of wooden slats joined by studs, which closed off a display of precious objects.

The house faces the decumanus maximus near the forum, in the northern part of Insula V. The upper floor was reached by a reconstructed staircase, and one apartment had its own street entrance and a shop entrance. The house closed in 1983 after collapses and reopened in 2019 following stabilization and roofing work.

The house is named for its rediscovery exactly two hundred years after the first explorations of Herculaneum began. Waxed wooden tablets found here point to the Petronii Colatorii as likely owners, while a seal naming the Etruscan freedman Marcus Helvius Erotus, found on the upper floor, may instead mark a tenant of that rented portion.