The Morund Collective has grown so wealthy over the past century and a half that they were able to purchase several thousand acres from the edge of the Matteland/Athirael border, and start the construction of Begureu.
In the years since, it's become the single largest city in the world in terms of sheer population. Renowned as a place of learning and science, it's the home of the famous Begureu University, widely considered the greatest in the world.
Technically a city-state, it's governed by the Morund itself, and only maintains an embassy in Escisland. The rest of the world has to travel to Begureu for its machines and wonders.