The Vatican unveiled the largest and most luxurious of the pagan tombs in the necropolis under St. Peter's Basilica on Tuesday after nearly a year of restoration work.

A family of former slaves built the Valeri Mausoleum during the second half of the second century, when Emperor Marcus Aurelius ruled. It is one of 22 pagan tombs in the grottoes under the basilica.

The newly restored tomb was shown to media Tuesday. Visitors can have a guided tour of the grottoes by appointment.