In the early Middle Ages, the village of Ruda, located some from Wieluń, was the seat of a castellan and a Roman Catholic archdeacon, which made it the center of local administration. In the mid-13th century, however, the importance of Ruda diminished, at the expense of Wieluń, which was located in a more convenient spot. In 1281, the castellan's office was moved to Wieluń, and by 1299, the term Land of Ruda (Ziemia rudzka) had been replaced in documents by Land of Wieluń (Ziemia wieluńska).