The Cathedral of Saint Cecilia of Albi(French: Cathédrale Sainte-Cécile d'Albi), also known as Albi Cathedral, is the seat of the Catholic Archbishop of Albi. First built in the aftermath of the Albigensian Crusade, the grim exterior resembles a fortress, but the interior is lavishly decorated with art and sculpture, a very ornate choir screen, and walls in bright blues and golds, in the Toulousian or Southern French Gothic style. It was begun in 1282 and was under construction for 200 years. It is claimed to be the largest brick building in the world. In 2010 the cathedral, along with its episcopal buildings, was designated a UNESCO World Heritage Site because of its unique architecture and the remarkable consistency in its design.

Saint Cecilia, also spelled Cecelia, was a Roman virgin martyr and is venerated in Catholic, Orthodox, Anglican, and some Lutheran churches, such as the Church of Sweden. She became the patroness of music and musicians, it being written that, as the musicians played at her wedding, Cecilia "sang in her heart to the Lord". Musical compositions are dedicated to her, and her feast, on 22 November, is the occasion of concerts and musical festivals. She is also known as Cecilia of Rome.