The name comes from the fact that the four components of the building, the central hall and the 3 corridors are forming the image of a bird with spread wings.
And since there are two sculptures representing phoenixes on the roof of the central hall, the entire construction became known as Hoo-do, Phoenix Hall.
EXIF info:
Nikon Df
Lens: 14mm F/2.8D
Focal Length: 14mm
Aperture: F/6,3
Shutter Speed: 1/1000s
ISO Sensitivity: ISO 200