The base of the exterior walls is made of stone brought in from Yamaguchi Prefecture in Japan. This particular granite is beige and sturdy with a natural texture that adds to the building’s aesthetic appearance.
The remaining wall surface is covered with rectangular ceramic tiles arranged in a brick pattern. Aside from protecting the exterior walls, the brown tiles provided camouflage protection against air raids. When the Allied Forces began bombarding Taiwan in November 1943, several major buildings in Taipei were destroyed. Fortunately, the Central Building survived intact thanks to these “defense color tiles.”