The basin seen from the west. Photograph: Jan Theo Bakker.
Detail of the holes for a grating. Photograph: Jan Theo Bakker.
Against the north-west facade of the Santuario della Bona Dea (IV,VIII,3) a curved basin (preserved height c. 1.00) was set (opus latericium) in the last quarter of the third century AD. The outside of the basin is lined by travertine blocks with a gutter and holes for a grating. It is not clear whether this was a true nymphaeum with niches, or a simple basin or trough.