Counts of Celje

Coat of arms of Ulrich II of Celje
Territory of Counts of Celje in mid-15th century

The Counts of Celje (Slovene: Celjski grofje) or the Counts of Cilli (German: Grafen von Cilli; Hungarian: cillei grófok) were the most influential late medieval noble dynasty on the territory of present-day Slovenia. Risen as vassals of the Habsburg dukes of Styria in the early 14th century, they ruled the County of Cilli as immediate counts (Reichsgrafen) from 1341. They soon acquired a large number of feudal possessions also in today's Croatia and Bosnia. They rose to Princes of the Holy Roman Empire in 1436. The dynasty reached its peak with Ulrich II of Cilli, but with his death in 1456 they also died out, and after a war of succession, the Habsburgs inherited their domains.