Frommer's Review
Today the tomb of St. Sebastian is in the basilica, but his original resting place was in the catacombs underneath it. From the reign of Valerian to the reign of Constantine, the bodies of Sts. Peter and Paul were hidden in the catacombs. The big church was built in the 4th century. The tunnels here, if stretched out, would reach a length of 11km (6 2/3 miles). In the tunnels and mausoleums are mosaics and graffiti, along with many other pagan and Christian objects from centuries even before the time of Constantine. Though the catacombs themselves are fascinating, the tour here is one of the shortest and least satisfying of all the catacomb visits.
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