Map of the crypt under St. Peter's Basilica in Vatican City, Pianta delle grotte Vaticane (title on object), Map of the crypt under St. Peter's Basilica in Vatican City. On the left a cartouche with text in Italian. On the right, a scroll of text with a dedication in Italian. The print is part of an album. print maker: anonymous, publisher: Giovanni Giacomo de'Rossi, (mentioned on object), Urbanus VIII, (mentioned on object), print maker: Italy, publisher: Rome, Rome, Vaticaanstad, 1635, paper, etching, height 759 mm x width 486 mm.