Aqua Claudia
The trace of the Arcus Neroniani between Porta Maggiore (top right) and the present Piazza San
Giovanni in Laterano (bottom left). The ancient villa Volkonsky is the residence of the British
ambassador in Rome and is unfortunately not open to the public, so major parts of the aqueduct
branch are not visible. (R. Lanciani: Forma Urbis Roma 31 Marcia)