The Verathans were a Gamma Quadrant culture. They civilization reached its height around thirty thousand years ago.
The first Verathan explorers to venture into space charted the deep impressions in the fabric of space-time that were created by 0 five hundred thousand years earlier. (TNG novel: Q-Zone)
Vash and Q visited the Verathan system between 2367 and 2369. Vash obtained a statue she and Quark would later sell in an auction on Deep Space 9. (DS9 episode: "Q-Less")