Nandaimon is a sanmon type gate or sangedatsumon, which can be translated as the "gate of the three liberations". Built with 6 pillars, its 3 entrances are symbolizing the three gates to enlightenment. Its role is to separate the sacred area from the profane space (same role as the Shinto torii gates), so when the visitor passes through such a gate, it is considered that he will be cleansed of three evil passions: greed, hatred and foolishness.
I photographed Nandaimon on a summer evening, with its old wood almost shining in the warm light of the sunset...
EXIF info:
Nikon D300
Lens: 8-16mm F/4.5-5.6G
Focal Length: 9.5mm
Aperture: F/7.1
Shutter Speed: 1/800s
ISO Sensitivity: ISO 250