Cathedral of Notre Dame, Paris, begun 1163, vaulted ca. 1180-1200; view showing renovated nave elevation of the 13thc, and colonettes added to columnar piers in the western nave (to transform them into piliers cantonnэ)

Cathedral of Notre Dame, Paris, begun 1163, vaulted ca. 1180-1200; view showing renovated nave elevation of the 13thc, and colonettes added to columnar piers in the western nave (to transform them into piliers cantonnés)