Lyon Cathedral is a Roman Catholic church located on Place Saint-Jean in central Lyon, France. The cathedral is dedicated to Saint John the Baptist, and is the seat of the Archbishop of Lyon. Begun in 1180 on the ruins of a 6th-century church, it was completed in 1476. Despite its long construction time, it has a relatively consistent architectural style. In 1998, the building, along with other historic sites in the center of Lyon, was inscribed on the UNESCO World Heritage List.

The Archdiocese of Lyon, formerly the Archdiocese of Lyon–Vienne–Embrun, is a Latin Church metropolitan archdiocese of the Catholic Church in France. The archbishops of Lyon serve as successors to Saints Pothinus and Irenaeus, the first and second bishops of Lyon, respectively, and are also called primates of Gaul. He is usually elevated to the rank of cardinal. Bishop Olivier de Germay was appointed archbishop on 22 October 2020.