A fourth century painting of the Apostle John was revealed this week on the walls of the Santa Tecla Catacombs. The catacomb is located beneath an office building in the city of Rome. Using laser burning techniques the restorers burnt inches of calcium carbonate which accumulated on the very humid walls of the catacomb chambers over the last 16 centuries. They also uncovered other 4th century pictures of Jesus, St. Paul, and the apostles. These paintings are believed to be the earliest artist renditions of these New Testament figures discovered to date.
For more pictures and information: National Geographic