[PhilD]

Ironically, this max. dominion increase also means on the turn you add that fifth temple (or the turn after, depending on the turn order - too lazy to check), your dominion spread will slow down until dominion in your maxed-out provinces catches up with the new maximum. This should be most perceptible if your maximum dominion is low, as the probability of a temple check increasing local friendly dominion is (30-3x current dom)%.