The original fifth-century apse mosaic was replaced in 1559 by a very similar fresco by Taddeo Zuccari. The composition probably remained unchanged: Christ is flanked by a good thief and a bad thief, seated on a hill while lambs drink from a stream at its base. The iconography of the mosaic was very similar to another 5th-century mosaic, destroyed in the 17th century, in Sant'Andrea in Catabarbara. An interesting feature of the interior is a framed hole in the floor, exposing a Roman era temple column that pre-dates Santa Sabina. This appears to be the remnant of the Temple of Juno erected on the hilltop site during Roman times, which was likely razed to allow construction of the basilica. The tall, spacious nave has twenty four columns of Proconnesian marble with perfectly matched Corinthian capitals and bases, which were reused from the Temple of Juno.