Built on the design of a Latin cross, the Romanesque cathedral of the 11th century has largely disappeared, except for the walls of the nave, after most of the cathedral was rebuilt in the Angevin Gothic style between the 12th to 16th centuries.
Impressive flying buttresses were added to support this huge structure and beside the cathedral stands the Gothic Tour Pey-Berland, the bell tower, which was built separately from the cathedral, as is common in this area.
You can reach the top of the tower by walking up the 231 steps of the spiral staircase to the top from which you'll receive a panoramic view of Bordeaux.