An artist’s rendering of City Creek CenterPhoto courtesy of City CreekSalt Lake City is the world headquarters for the fastest growing church in America, and the influence of the Church of Jesus Christ of Latter-day Saints is everywhere. The six gray spires of the Salt Lake Temple rise above the city. A gleaming granite convention center dominates an entire city block across the street. Even in subtle ways -- street names, for example -- one is reminded of the church's impact on city planning. Are you driving down 400 South? Then you're four blocks south of the temple. But now …