The Reformation Wall (Mur des Réformateurs) runs for 100 metres along the outer wall of the old city in the Parc des Bastions, directly below the Vieille Ville. Built between 1909 and 1917 to mark the 400th anniversary of Calvin's birth, the bas-relief carvings depict the four principal figures of the Geneva Reformation — John Calvin, Guillaume Farel, Theodore Beza, and John Knox — each standing four and a half metres tall, flanked by secondary figures and inscriptions in French.
The park around the wall is pleasant and free to enter, with large chess boards on the lawn where games are often in progress on fine days. The Geneva motto carved into the wall — "Post Tenebras Lux" (After Darkness, Light) — gives the Reformation's self-understanding in three words. The park connects to Place Neuve, just north, which has the Grand Théâtre, the Conservatoire, and the Musée Rath around its edges.