San Vittore in Ciel d'Oro is a historic church located in Milan, Italy. It is known for its stunning mosaics and rich history, dating back to the 4th century. The church is dedicated to Saint Victor, a Christian martyr, and features a beautiful apse adorned with golden mosaics that depict scenes from the life of the saint. The church has undergone various renovations over the centuries, reflecting different architectural styles. It is part of the Basilica of San Vittore complex, which includes a monastery and other religious buildings. Today, it serves as a significant cultural and religious site, attracting visitors for its artistic and historical value.