The façade of San Zeno contains a collection of most impressive medieval artistic creations. The great thirteenth-century rose window represents the Wheel of Fortune, with an inscription that reads, “I, Fortuna, determine the fate of mortals.” The porch by the artist Nicolò, which dates to the 1140s, has a gabled roof supported by two columns that stand on the backs of lions. The sculptures on the tympanum (over the door) and on either side of the door are examples of relief sculpture from the twelfth century made by Guglielmo. The subjects are taken from the story of Genesis and from the Life of Christ and form a continuous pattern with the bronze doors. These show figures from the Old and New Testaments and four scenes devoted to San Zeno. A century of artistic development distinguishes work from the beginning of the twelfth century from that of a century later. The façade is typical of Italian design, with its strict modular division into bays and the absolute control of the sculpted elements. It is greatly admired for its harmonious proportions.