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