I research tech to build the goodies, Great Mill, Merchantcross Bazaar, etc, LONG before AI factions have any tech at all. Still unable to build them, even when my cities are of adequate size and have build what I presume are the required precursor buildings. Just got access to Great Archives over 80 turns after I'd researched the technology, and in my smallest Conclave - all the others had already build every building in the menu.
Ideas? (I know that whoever starts a building first locks out the others, but this can't be happening when the AI tech is at a total of 12 when I complete the necessary research.)