[1] Following the death of Ulrich II of Celje, the county was subsumed by neighbouring Duchy of Styria.

County of Cilli was created after lords of Saneck inherited lands in Slovenia and surrounding areas.

They continuously gained land via strategic marriages and their loyalty to their immediate liege, the Habsburgs of Austria.

Hermann II, Count of Celje was also father-in-law to the Hungarian king Sigismund who eventually became the Holy Roman Emperor and granted multiple fiefs in Slavonia and Croatia to his father-in-law.

After Sigismund, the Luxembourg line went extinct and the Habsburgs succeeded as Emperor, further strengthening the Count of Cilli.