The Cathedral Basilica of Saint Cecilia, 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. 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.