The regional ruling Voivode of Transylvania acted for the King of Hungary. Medieval Transylvania was smaller than the area currently known as Transylvania. Areas of Maramureş and Oaş to the north, Crişana to the west and Banat to the south formed part of Greater Hungary.Szekelers
The Szekelers were invited to move to the South East region of Transylvania in C11, to protect the frontiers of the Hungarian Empire, in return for autonomy from the feudal system. The Szekelers consider they are descendants of the Huns, but it is more likely that they are a group of Magyars from the Bihor region. Their area of Transylvania, known as Szekelyfold, remains over 95% Szekely.