French-Canadian architect Louis Bourgeois spent eight years perfecting his design and construction began in 1921. But, it took decades to complete the magnificent structure because of the complexity of the design. The temple is the world's first pre-cast paneled concrete building, which means each ornate section was created by pouring concrete into a mold and then painstakingly hoisting each completed piece onto the building. The process took so long Bourgeois died before its completion in 1953, leaving other architects to finish the job.

The Baha'i House of Worship is filled with symbolism. For instance, on the 3rd tier square openings were built in multiples of 9, a number representing unity. This vantage point also puts in perspective just how massive this structure is!