Premise: As you face the harmoniously asymmetrical western facade, the southern tower, the Clocher Vieux, is a prime example of Roman?­esque simplicity, whereas the taller northern tower, the Clocher Neuf, is already lighter, with its slender, more ornate steeple.

Hypothesis: The western tower followed in the southern tower's footsteps and also was a good example of Romanesque simplicity.
Relation: neutral