Todai-ji is a Buddhist temple originally built in 752 c.e. It was reconstructed in 1692 c.e. but only at 2/3 the size of the original temple - still very large. No nails were used in its construction. At first (752 c.e.) Todai-ji was the head temple for all Japanese Buddhist temples. Currently it is the Japanese headquarters for one sect of Buddhism - Kegon.