So the Taiyuin Mausoleum was built in 1653 by the following shogun, the son Tokugawa Ietsuna, and the result was this masterpiece of architecture and decoration, today listed as UNESCO World Heritage Site.
An interesting fact is that the Taiyuin architecture is very different from the Toshougu architecture, with much simpler ornaments - this was Iemitsu's way to show respect for his predecessor. The colors are also different: Toshougu Shrine is predominantly white and golden, while the Taiyuin Mausoleum is for the most part gold and black, with a little red framing:
EXIF info:
Nikon D90
Lens: VR 18-55mm F/3.5-5.6G
Focal Length: 18mm
Aperture: F/5.6
Shutter Speed: 1/80s
ISO Sensitivity: ISO 250