 The thirty-fifth and last bishop of Alet, Charles de la Cropte de Chanterac, who opened the "Grande route" (Big road) Limoux-Quillan, also built a new portion of the bishopric, which he attached to the oldest part of the bishopric, which dates from the twelfth century and is now preserved.By climbing a flight of stairs, one would come to the first floor where one can see the beautiful and large synod hall as well as the library.The bishopric and its three hectares of gardens span a large portion of the old abbey.