The ancient empire of Thassilon (pronounced THAH-sih-lon) occupied most of western Avistan. While its power was great, struggles for control within the nation itself tore Thassilon apart. All that now remains are mysterious ruined monoliths scattered throughout the landscape of Varisia
Thassilon was founded by the benevolent emperor Xin, who first harnessed the power of rune magic. Due to the immense size of the empire, Xin established seven fiefdoms run by his most trusted advisors and the most powerful arcanists in the land. As his personal influence over the nation became smaller, his ideals were also pushed to the wayside, making way for the villainy of the sinful runelords, who gained even more power than Xin, but did so on the backs of the people.