 Le Gros' subject was "Religion Overthrowing Heresy", a dynamic group of four over-lifesize marble figures on the altar's right hand side.With her cross and a bundle of flames, the towering "Religion", meaning Catholic religion, drives out heresy, personified by an old woman tearing her hair and a falling man with a serpent.To leave no doubt as to who specifically are considered heretics, three books bear the names of Luther, Calvin and Zwingli, whose book is torn apart by a putto.