The Via Sublacensis was a Roman road constructed to connect Nero's palace[1] (the Villa Sublacensis) in present-day Subiaco to Rome, splitting off from the Via Valeria[2] near Varia (modern Vicovaro), about 10 km northeast of Tivoli.
It was referred to in relation to the source of the Aqua Anio Novus, a major aqueduct which was originally at the 38th milestone of the Via Sublacensis.[3]
The junction of the Via Sublacensis with the Via Valeria was discovered in 1889 at Casaletti, in the valley below Roviano, during the construction of an aqueduct at a distance from Rome of 36 miles, according to the preserved milestones.[4]
41°58′51″N 13°01′49″E / 41.980933°N 13.03038112°E