Sum of All (Planescape)
If the rilmani have any capital at all, Sum Of All holds the best argument for such a title. Immense for a rilmani settlement, given that they rarely surpass a few dozen, Sum Of All spans a full mile across in every direction, and holds tens of thousands of rilmani within its walls. This city is the pinnacle of plumach architecture and design, with its pearl-laced domes, its buildings studded with gems mined from the base of the Spire; all the more impressive given the natural methods that were required to construct it, given its location within the First Ring, just barely a mile from where the cessation of magic takes hold.
Though known by name for centuries thanks to the reports of Sazraen Tildoma, even she was allowed within its walls only for a short time. It was only as of late that the possible reason for the existence of such a large rilmani city was found, as well as a possible long-standing answer to the question of just how the rilmani managed to travel out from their territory so easily to affect their plans.