The bishops apartment consisted of two antechambers, bedroom-study and a study. The antechamber adjacent to the dining room area was once decorated with a plafond depicting the scene of the 1634 treaty ending the Polish-Muscovite War ("Treaty of Stuhmsdorf"), while its walls were covered with a gilded cordovan. Among the elements of the original furnishing the most important are black marble fireplace topped with the Korab coat of arms and the remnants of marble floor. The framework "Venetian" ceilings, patterned after such in the Palazzo Ducale, appeared in Poland in the early 17th century initially in the interiors of royal residences (Wawel Castle). Such decoration soon become the main feature of the representative chambers of the noble residences, town halls and even merchant houses. Among a dozen ceilings documented in sources only two preserved - in Gdańsk and Kielce.