The beauty in the architecture of the first floor, however, is what gave the Exeter Library its fame. This main floor reaches 70 feet in height and soaks in natural light from a clerestory at the top of this space and from large expanses of glass on the north and west sides. From this 50 foot square space visitors can spot metal bookstacks and readers seven levels above through large holes punctured perfectly into the walls, almost touching at the corners where the walls square off.