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.