The Basilica of Saint-Nazaire is a historic church located in the town of Carcassonne, France. It is known for its stunning Romanesque and Gothic architecture, featuring beautiful stained glass windows and intricate stone carvings. The basilica serves as a prominent example of medieval religious architecture and is part of the Cité de Carcassonne, a UNESCO World Heritage site. Originally built in the 11th century, the basilica has undergone several renovations over the centuries. It is dedicated to Saint Nazaire, a Christian martyr, and attracts many visitors each year who come to admire its artistic and architectural significance. The church also hosts various religious services and cultural events.