Hungary was founded by a grand prince.
Hungary . Following centuries of successive habitation by Celts , Romans , Slavs , Gepids and Avars , the foundation of Hungary was laid in the late 9th century by the Hungarian grand prince Árpád in the conquest of the Carpathian Basin . Stephen I , also known as King Saint Stephen ( Szent István király Sanctus Stephanus Štefan I. or Štefan Veľký 975 -- 15 August 1038 AD ) , was the last Grand Prince of the Hungarians between 997 and 1000 or 1001 , and the first King of Hungary from 1000 or 1001 until his death in 1038 .