The Laurentian Library, part of Michelangelo's overall plan for S. Lorenzo, has an interior in the Mannerist style. The wall is divided into numerous bays, each with two windowlike stories, some glazed and some not.
Pilasters flank each bay and pass the two stories.
This creates an architectural solution radically different from the earlier Renaissance ideal which called for one structural unit to a story. The new solution is known as the Giant Order. The interior decorations are also Mannerist, with a richly inlaid floor, stained glass windows, intricately carved bookstalls, and an ornamented painted ceiling.