The Illyrian kingdom was an Illyrian political entity that existed on the western part of the Balkan Peninsula in ancient times. Regardless of the number of the alternately ruling dynasties, of their tribal affiliation, and of the actual extension of their kingdom, it represented an alliance of Illyrian tribes that united under the rulership of a single leader, expressly referred to as "King of the Illyrians" in ancient historical records. The monarchic superstructure of the Illyrian state coexisted with the Illyrian tribal communities and the republican system of the Illyrian koina.