Among the exhibited works are the unique Sarmatian portraits, medieval and Renaissance pictures of worship, handwritten manuscripts, old prints and the parchment of the papal encyclicals.
The Diocesan Museum in Siedlce is the largest museum in east - central Poland. Its 18 rooms contain several hundred exhibits. Among the collection are pictures, sculptures, chalices, canonicals, coins, medals and masterpieces of craft art. All exhibits underwent a process of conservatorship. An equal number of objects are in storage awaiting restoration.