The settlement in the years 1834-35 of the entire area near the Aniene River, with the construction of the Gregorian Tunnels and the regimentation of the water, by Pope Gregory XVI, also included the construction of the Gregorian Bridge as a direct link between the Via degli Abruzzi (Via Tiburtina Valeria) and Via del Colle (ancient Via Tiburtina).
The Bridge, ca. 40 m long, is a single arch 36.66 m long, 10 m high, resting on two lateral piers with travertine bases. It is flanked by strong supporting structures, built on either side of the piers, in opus reticulatum embellished with niches.
During the last war, the bridge was blown up by retreating Germans on May 27, 1944; it was rebuilt in 1946 following the original design.
Today it represents a monumental passageway from which to view the acropolis with its temples and look out into the abyss embraced by the Park of Villa Gregoriana.
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