Monte Compatri is a small town located in the Castelli Romani hills southeast of Rome, in the province of Rome. It is one of the Castelli Romani. Monte Compatri has been identified as the place where Egeria, the nymph of the springs of the Aqua Marcia, and wife of Numa Pompilius, the second king of Rome, retired to live in seclusion and to practice religious rites. According to a legend, after the rise of the Roman Republic, she fled to the woods of Monte Compatri, where she founded a temple of Vesta and remained until her death.
The town is located on the slopes of the Monti Prenestini, at an altitude of 650 metres above sea level. It is 9 kilometres from Palestrina, 18 kilometres from Rome and can be reached by the SS7 Via Appia. The town is served by a railway station on the Rome-Naples line.