This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations. (November 2015) (Learn how and when to remove this template message)
San Vittore is a prison in the city center of Milan, Italy. Its construction started in 1872 and opened on 7 July 1879.
The construction of the new prison was decided after the Italian unification, together with other infrastructure improvement works in Milan in the period between the unification and the city's first town plan of 1889. Until then, prisoners were detained in several other structures not designed as prisons, among them the former Sant'Antonio Abate convent, in the Courthouse and in the former San Vittore convent.
For the construction of the new structure the government acquired terrains in the outskirts of the city, in a sparsely developed area at that time. The building, designed by the engineer Francesco Lucca, takes inspiration from the 18th century Panopticon, with 6 wings with three floors each. The perimeter walls were originally built in medieval style, but they have almost all been rebuilt with modern standards for security reasons.