SOURCE: Jean Gabriel Merigot. A select collection of views and ruins in Rome and its vicinity (London, c. 1820) NOTES: Castel Sant'Angelo was originally constructed as a mausoleum for the Emperor Hadrian in 135-139 AD. The bridge, built at the same time to connect the mausoleum to the Campus Martius, was named Ponte Elio. When the mausoleum became a castle in 401 AD it was renamed Castel Sant'Angelo and the bridge took the same name.
SOURCE: Pietro Santi Bartoli. Gli Antichi sepolcri, ovvero mausolei romani, ed etruschi trovati in Roma, ed in altri luoghi celebri (Rome, 1768), pl. 36
SOURCE: Pietro Santi Bartoli. Gli Antichi sepolcri, ovvero mausolei romani, ed etruschi trovati in Roma, ed in altri luoghi celebri (Rome, 1768), pl. 49 NOTES: This tomb no longer existed at the time it was drawn by Bartoli and this image was copied from drawings by Pietro da Cortona.
SOURCE: Pietro Santi Bartoli. Gli Antichi sepolcri, ovvero mausolei romani, ed etruschi trovati in Roma, ed in altri luoghi celebri (Rome, 1768), pl. 73 NOTES: This Roman tomb is traditionally identified as the tomb of Virgilius.