Val Brinkerhoff, a professor of photography at BYU, has spent years studying and photographing sacred symbols, art and architecture, etc. He has photographed most most LDS temples, as well as numerous temples, mosques, cathedrals and sacred places throughout the world. Over 3000 of his photographs are online here.
He has also recently published a two volume book--The Day Star: Reading Sacred Architecture--with hundreds of photographs on his interpretation of sacred symbols and the LDS Temple.
It can be purchased on Amazon.com: ISBN 1934537454.
His work is well worth studying.