German historiography refers to a group of feudal lord’s vassals as a feudal court (Lehnshof). At their zenith, the Counts of Cilli/Celje were perhaps the most powerful feudal lords in today’s Slovenian territory. The social and provincial allegiance of their vassals varied. The vassals were acquired through various means, sometimes even by force. Obligations, partly determined by both written and customary feudal law, were mutual. The feudal court of the Counts of Cilli, which also represented a source of personnel from which they recruited their court-territorial officials, was just as diverse as their feudal practices.