The archbishop of Cologne governs the Roman Catholic Archdiocese of Cologne in western North Rhine-Westphalia. Historically the archbishop ruled a state of the Holy Roman Empire and was ex officio one of the prince-electors, the elector of Cologne, from 1356 to 1801.
The "Seven Prince Electors" electing Henry, Count of Luxembourg as Henry VII, Holy Roman Emperor at Frankfurt on 27 November 1308. At far left is Heinrich II of Virneburg, Archbishop of Cologne. Codex Balduini Trevirorum, c. 1340)
Saint Engelbert II of Berg, Archbishop of Cologne
Image: Ruprecht von der Pfalz, Bischof von Köln
Image: Hermann von Wied
An Imperial State or Imperial Estate was a part of the Holy Roman Empire with representation and the right to vote in the Imperial Diet. Rulers of these Estates were able to exercise significant rights and privileges and were "immediate", meaning that the only authority above them was the Holy Roman Emperor. They were thus able to rule their territories with a considerable degree of autonomy.
Seating order of the Perpetual Diet of Regensburg (1663 engraving)
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),