Interior. Tumulus 51 (1st century BC)
Tumulus consisting of low cylindrical drum made of travertine slabs supporting an earth cone. Two flights of steps lead to the antechamber of the subterranean funerary chamber, covered by a barrel vault with sepulchral beds along the walls. The building was built in the late Hellenistic age; an inscription of the 2nd century AD refers to the last occupant, Lucius Salvius Paolinus.