The municipality of Guidonia Montecelio, formed by the main towns of Guidonia and Montecelio, lies to the north-east of
Rome, some kilometres from the
Grande Raccordo Anulare - a ring-shaped motorway which forms a circle around the capital. The terrain of Guidonia Montecelio is mainly flat, and the community lies in between the
Via Nomentana and the
Via Tiburtina. It borders with
Fonte Nuova,
Marcellina,
Palombara Sabina,
Rome,
San Polo dei Cavalieri,
Sant'Angelo Romano and
Tivoli. The hamlets (
frazioni) are Albuccione, Bivio di Guidonia, Colle Fiorito, Colleverde, La Botte, Marco Simone, Montecelio, Pichini, Setteville, Setteville Nord, Villalba and Villanova. ==History==