Actually, it is only a part of the original palace, about 1/6 of the original surface, but includes all the important halls: the entrance hall, the reception hall (in today's photo), and the chief retainer’s office.
EXIF info:
Nikon Df
Lens: 24-70mm F/2.8G
Focal Length: 24mm
Aperture: F/3.5
Shutter Speed: 1/60s
ISO Sensitivity: ISO 4900