The roof is the most visually impressive component, often constituting half the size of the whole edifice. The slightly curved eaves extend far beyond the walls, covering verandas, and their weight must therefore be supported by complex bracket systems called "tokyō", in the case of temples and shrines. Simpler solutions are adopted in domestic structures. The oversize eaves give the interior a characteristic dimness, which contributes to the building's atmosphere. The interior of the building normally consists of a single room at the center called "moya", from which depart any other less important spaces.