Princely Patronage achievement was given to me after completing ONE piece of it. Currently the Achievement reads "Rebuild the Cartographical Archives, the Salt Baths of Stormfall, the Refuge for the Blind, AND the entire Primordial Institute" however I got the Achievement after completing JUST the Cartographical Archives in the game.
Either the achievement is broken, or the wording is wrong (I'm guessing the wording isn't wrong, and it intended to be "AND").