A nobis abigas lubrica gaudia Tu, qui martyribus dexter ades, Deus Une et trine: tuis da famulis jubar, Quo clemens animos beas. Amen." There is nothing especial to notice in _S. Adriano_, which is built in the ruins of the basilica of Emilius Paulus, or in _S. Lorenzo in Miranda_, which occupies the temple of Antoninus and Faustina, but _Sta. Maria Liberatrice_, built on the site of the house of Numa and the convent of the Vestals, commemorates by its name a curious legend of the fourth century. On this site, it is said, dwelt in a cave, a terrible dragon who had slain three hundred persons with the poison of his breath. Into this cave, instructed thereto by St. Peter, and entrusting himself to the care of the Virgin, descended St. Silvester the Pope, attended by two acolytes bearing torches, and here, having pronounced the name of Christ, he was miraculously enabled to bind the dragon, and to shut him up till the day of Judgment. But when he ascended in safety, he found at the mouth of the cave two magicians who had followed him in the hope of discovering some imposture, dying from the poison of the dragon's breath,--and these also he saved alive. We now reach the circular building which has been so long known as the temple of Remus. To the right of the entrance are two pillars of cipolino, almost buried in the soil. The porphyry pillars at the entrance, supporting a richly sculptured cornice, were probably set up in their present position when the temple was turned into a church. The bronze doors were brought from Perugia. If, as is now supposed, the temple on this site was that of the Penates, the protectors against all kinds of illness and misfortune, the modern dedication to the protecting physicians Cosmo and Damian may have had some reference to that which went before.