Zagarolo is a town and comune in the Metropolitan City of Rome, in the region of Lazio of central Italy. It lies 34 kilometres southeast of Rome, and it borders the municipalities of Colonna, Gallicano nel Lazio, Monte Compatri, Palestrina, Rome, San Cesareo.
Zagarolo's town center lies on a very narrow tuff hill, 2 kilometres long and about 100 metres wide, at an elevation of 310 metres, surrounded by green valleys. The southern continuation of an important pilgrim route, the Via Francigena passes through the Zagarolo countryside.
Wikipedia https://en.wikipedia.org/wiki/Zagarolo
Coordinates 41°50'18.181" N 12°49'51.78" E