San Vittore, Romanesque basilica in Arsago Seprio, Italy

San Vittore is a basilica with three naves separated by alternating pillars and Roman columns that lead to three eastern-facing apses. A stone bell tower topped with saw-tooth decorations rises above the structure and defines the complex's outline.

San Vittore was built between the 9th and 12th centuries over a 5th-6th century building, whose traces remain outside the apse. Construction is linked to Arnolfo II da Arsago, Archbishop of Milan from 998 to 1018, and was entrusted to the Maestri comacini. The octagonal baptistery dates to the mid-12th century.

The baptistery faces the church facade and has two entrances, on its south and north sides. Its east window is set at an angle toward the south, probably so that the Morning Star could be seen at dawn after Easter, when catechumens were baptised. Inside, the octagon has eight niches and a matroneum reached by two stairs cut into the walls.

The church holds regular religious services and belongs to the Catholic community, with entry through a central portal restored in the 18th century. Visitors should dress respectfully and be mindful of any ongoing religious activities they may encounter during their visit.

The main facade bears eight square openings that once supported wooden beams for a front portico, revealing how the church's exterior changed over time. These details show the practical building solutions of early medieval builders.