Wiktionary
capital of the world
n. used to emphasize a location's ties with a particular noun
Usage examples of "capital of the world".
Alas, to be born during this time was to be born during a time of creativity and prosperity, when Rome was caput mundi, or capital of the world.
Here we stood in the capital of the world: Gregory sparkled v the surety of his power, and I walked beside him, drunk on be alive, drunk on all the eyes turned to us.
Ben-Hur's heart beat hard as for an instant he had a vision of Jerusalem the capital of the world, and Zion, the site of the throne of the Universal Master.
This was Bream Field, the self-proclaimed helicopter capital of the world.
Central Florida's the lightning capital of the world, don't you know.