Zagarolo is a town and comune in the Metropolitan City of Rome, in the region of Lazio of central Italy. It lies 34 kilometres south-east 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 south continuation of the important pilgrim route Via Francigena passes through the countryside of Zagarolo.
Zagarolo may have origins in Gabii, an ancient city founded in the 5th century, which is a few kilometers from Zagarolo. The town center is of medieval origin and its current urban plan was developed in the 16th century. Zagarolo is the birthplace of composer Goffredo Petrassi.
Coordinates 41°50'18.181" N 12°49'51.78" E