 The Gepids and their allies subsequently founded kingdoms on the Middle Danube, bordering on the Roman Empire.The Gepid Kingdom, was one of the most important and long-lasting of these, centered on Sirmium, and sometimes referred to as Gepidia.It covered a large part of the former Roman province of Dacia, north of the Danube, and compared to other Middle Danubian kingdoms it remained relatively un-involved with Rome.