châtellerie
A châtellerie was a historical administrative and territorial division in medieval France. It was a unit of territory controlled by a châtelain, a castellan, or lord who held a castle (château) as his seat of power. The châtellerie encompassed the lands directly administered by the châtelain, who was responsible for justice, taxation, and military organization within its boundaries. These territories varied greatly in size and importance, often depending on the strategic significance of the castle and the wealth and influence of its lord.
The châtellerie was a fundamental element of feudal administration. The châtelain acted as the king's or a