A "Quaternion Eagle" (each quaternion being represented by four coats of arms on the imperial eagle's remiges) Hans Burgkmair, c. 1510. Twelve quaternions are shown, as follows (eight dukes being divided into two quaternions called "pillars" and "vicars", respectively): Seill ("pillars"), Vicari ("vicars"), Marggraven (margraves), Lantgraven (landgraves), Burggraven (burggraves), Graven (counts), Semper freie (nobles), Ritter (knights), Stett (cities),