Ground plan of the Mausoleum of St. Helen,  from Le Antichità Romane (Roman Antiquities), tome 3, tavola 17
Object type: Print
Department: Drawings and Prints
Portfolio: Le Antichità Romane, tome 3
Artist: Giovanni Battista Piranesi|Angelo Rotili
Artist bio: Italian, Mogliano Veneto 1720–1778 Rome| 
Artist role: Artist|Publisher
Artist nationality: Italian|Italian
Date: published 1756–57
Medium: Etching
Dimensions: sheet: 21 1/4 x 15 3/16 in. (54 x 38.5 cm)
plate: 13 9/16 x 9 1/4 in. (34.5 x 23.5 cm)
Classification: Prints
Credit line: Rogers Fund, transferred from the Library
Accession year: 1941