Grill work through which another pope can be seen below.
Chapel of the Transfiguration In this chapel you can admire a mosaic reproduction of one of the world's most famous paintings "The Transfiguration" showing Christ on Mount Tabor, Raphael's last painting.
Altar of Immaculate Conception A painting by Bianchi was converted into mosaics. St Peter's Basilica does not have paintings. All the beautiful art that looks loike paintings are actually mosaics done using precious and semi precious stones.