Ruins of a Classical building with an apse. Interior of praetorian castle, with scattered small-scale figures. At left, is a section of a high wall with two arched doorways. At right, a curved wall with seven niches surmounted by a half-dome (the apse). Etched in the cartouche: Avanzi di una Sala appar / tenente al Casto Pretorio nel / la Villa Adriana in Tivoli / A. Tribunale ornato di nicchie, and signed on the plate at lower left: Cvalier Piranesi F.