When you are the first to discover a new religion (or the first to research the tech associated with that religion) you gain the Holy City. This is done arbitrarily. Does anyone know if a structure goes up when the Holy City is founded? I seem to recall an article mentioning that a Great Person could rush a temple or shrine, yes i think it was shrine, associated with that religion. I also think that in the Pre-release info there was a section that put the shrines as Small Wonders. Does this mean all civs can get the shrines? Or is it much more restricting and only the Holy City can build the shrine. I don't know if there has been any info on this, but i thought i would put it out there.