It consists basically of a few major monuments, dating in general to the time of Septimius Severus:*"Santuario di Santa Maria della Rotonda", built probably as a garden "nympheum" at the Villa of Domitian at Castel Gandolfo, was later incorporated in the complex of Castra Albana by Septimius Severus and eventually became, around the 7th century, a Christian shrine.
Zdaj je delno vključen v območju Ariccia.