San Giacomo Church, Medieval church in Como walled city, Italy.

San Giacomo Church is a building in Como featuring Roman-Lombard architectural elements with two bell towers, one of which later became the Broletto civic tower. The structure displays characteristic romanesque forms and continues to define the appearance of the medieval city center.

The earliest documented mention of San Giacomo dates to 1144, although construction began in the 11th century during Bishop Rainaldo's tenure. The church rose during a period of religious and urban development in the region.

The name comes from the apostle James; the church was already a parish by 1279. In the central apse a Romanesque choir of seven niches survives, and the basin holds a mid-17th-century Pentecost by Giovanni Battista Colomba. The south transept has a Deposition with Franciscan saints attributed to Ercole Procaccini the Younger, and the Cernezzi chapel a Saint Philip Neri attributed to Montalto.

The church has undergone major restoration work since December 2021 to ensure the dome's structural integrity through private funding. Visitors should check ahead about current access conditions and any ongoing work that might affect their visit.

Before the Broletto was completed in 1215, the earliest assemblies of Como's municipal government held their meetings within the church walls. The space served as the city's first administrative center before a dedicated city hall was built.