Andrew III of Hungary
The monarchs or on their behalf the voivodes could also convoke the representatives of all privileged groups of Transylvania to meet at a joint assembly. Andrew III of Hungary was the first king to hold such an assembly for the representatives of the Transylvanian noblemen, Saxons, Székelys and Romanians in early 1291. According to Andrew's charter mentioning the meeting, the king ordered the return of two domains to Ugrin Csák after those who attended the general assembly testified that he had been their lawful owner.