Built in 2008 to showcase the Buddha's teaching, the pagoda is the world's largest unsupported dome structure, pieced together using an ancient technique of interlocking blocks.

BBC: Following the Buddha around Bombay

The 36-ton blocks do not touch and were installed the way the ancient Egyptians built the pyramids, by tipping blocks into sand.

WSJ: Louis Kahn | Four Freedoms Park | Louis Kahn's Four Decades to Freedom | By Julie V. Iovine