Something like that. Though I'd prefer if it weren't explicitly religious... and preferably smaller than Corsanctum. Like,one city, 2-3 rurals having some kind of special legitimacy; maybe the claimant to that throne has special rights over other realms' thrones.
It'd have to be entirely RPed; it's just always something I've thought about;or at least ever since the CCA in Beluaterra. We united Irombrozia and Fwuvoghor by marriage, I had hoped to unite Heen and Irombrozia by marriage as well, then make peace with Rio as well, and gradually form more marriage alliances around BT. But alas, it was not to be. I was thwarted by invasions, multi-cheaters, and the allure of Dwilight.