The material located in the so-called "back house" was collected by the manager of the County Library Imre Slezsák (1932-2002) and Béla Augusztinyi.

The historical Boesod county is one of those established by St. Stefan during the establishment of the state. The early counties were led by the bailiffs assigned by the king. Their work involved county administration,directing the judgment and tax collection duties, and the arrangement of the military operations. Their residence used to be at places such as the Borsod castle.