The Ichnography of Rome, in the fine collection of antiquities in the Palazzo Farnese, was found in the temple of Romulus and Remus, which is now dedicated to Sts. Cosmo and Damiano, who were also twin brothers. Though incomplete, it is one of the most useful remains of antiquity. The names of the particular buildings and palaces are marked upon it, as well as the outlines of the buildings themselves; and it is so large, that the Horrea Lolliana are a foot and a half long; and may serve as a scale to measure any other building or palace in it. It is published in Groevius's Thesaurus.