From PathfinderWiki

The ancient city of Xin-Eurythnia was the capital of the Thassilonian realm of Lust, Eurythnia. Ruled by the Runelord Sorshen, it was destroyed during the cataclysmic events that followed Earthfall in -5293 AR. The modern Varisian city-state of Korvosa is built in the exact same location, and a few ancient remnants of the capital still survive.1