getting there: short walk from the Colosseum or the Vittorio Emanuele II Monument
open: 10:00-13:00 & 15:00-18:00
inside: The main altar has a beautiful apse mosaic dating from the 6th century (which can better be seen by using the coin-operated light) and it is this example of Byzantine mosaics that the church is visited for.
The the rest of the decorations of the church which date from the 1632 restoration look a little shabby and worst for wear.
The altarpiece by Giovanni Baglione is very damaged. It is here that the Baroque artist was buried.