This library designed by Rem Koolhaas is one of many examples of his taking a simple shape, like a cube, and twisting it, entertaining its viewers. Here, the center shows what may have been the starting concept, a cube. Flat sides, right angles around the building. But above and below the center, we see it break from the right angles, going outwards to meet the head and feet of the building. The foot of the building has a slanted line going from left to right, and the left and right sides are not a right angle to the ground. Behind the glass, the white diamond pattern is continuous, not conforming to the twisted lines that outline the building. Inside, the books rest in a continuous spiral shelving system.