In the Annex, a rather dark and labyrinthine corridor leads to the center of the library, illuminated by daylight, which is composed of concentric squares of wood, evoking interest by Ando processional walks through space toward a well-defined point . Within the annex building, a mirror reflects the water surface of glass and concrete volumes, extending vertically the facade. A horizontal window at ground level at home and abroad of water allows a relationship between external and an internal game between the glazed surfaces and the reflection of water.