Acquedotto storico e antichi opifici (archi di Boccalupo e maglio idraulico)

The Boccalupo valley preserves Bracciano's hydraulic and industrial history: Renaissance aqueduct arches, an eighteenth-century water-powered hammer, and the remains of paper and iron works once supplied by lake-country water.

Why it matters

Bracciano's first aqueduct, begun around 1578 under Paolo Giordano I Orsini, carried water to mills and forges below the town. The system continued an engineering tradition reaching back to Trajan's aqueduct of 109 AD, which drew water from springs near the lake to supply Rome. After the Odescalchi acquired the fief in 1696, a new aqueduct was built between 1700 and 1710 to designs by architect Carlo Buratti. It supplied a paper mill, ironworks and mills that became part of the duchy's economy.

What to notice

The Boccalupo arches are stone arcades crossing the valley between Bracciano and Manziana. Near the town, the remains of an eighteenth-century water-powered forge hammer show how the aqueduct's flow was converted into mechanical force. The nineteenth-century conversion of a former ironworks into a public washhouse reflects successive uses of the industrial structure. Weirs and stone channels preserve traces of the valley's water system.

Context and history

Roman engineers tapped springs around the lake, and Trajan's aqueduct carried water to Rome. Renaissance dukes later revived water power for local industry. The Orsini aqueduct of 1578 supported workshops below the town. After the Odescalchi acquired the fief in 1696, Livio I Odescalchi commissioned a new conduit, built between 1700 and 1710 under Carlo Buratti. The aqueduct supplied the paper mill and ironworks, giving Bracciano a manufacturing role unusual for a small ducal town. The fief passed to the Torlonia in 1803 and was repurchased by the municipality in 1848. As water power gave way to steam and electricity, the industrial installations closed, leaving their remains in the valley.