View of a colorful mosaic depicting the Third Ecumenical Council that was held in Ephesus in A.D. 431.
That council declared the Virgin Mary as "Theotokos"—the "God-bearer." The Basilica of Notre-Dame de Fouirvière that is located in Lyon, France is dedicated to the Virgin Mary.
The basilica was built between 1872 and 1896. The basilica occupies the site of what was once the Roman Forum of Trajan in Lugdunum (latin: forum vetus [old forum]). The name was inverted and corrupted to the French Vieux-Forum.
The Wikipedia article can be found Here.