The main altar of the church is opposite the entrance, and the original 7th-century icon of the Madonna and Child can be seen above it. This was previously dated to the 13th century, but the 7th-century original was recently recovered under layers of overpainting. It is a rare survival of an icon from a period when they were a common feature in Roman churches. The apse is decorated with a golden mosaic featuring crosses. http://www.sacred-destinations.com/italy/rome-pantheon