The exhibition is located on the ground floor of the north-eastern corner of the castle. It is related to the historic institution of the Crown Treasury once located here, which was a visible sign of the independence of the Kingdom of Poland, and later of the Commonwealth of the Two Nations. From the 14th century the insignia of royal power were stored here (crowns, sceptres, orbs, a sword, the Book of Gospels and a tray used in the ceremony of anointing a ruler), as well as a variety of valuables and curiosities which were official state property. At the same time in the castle the monarch’s private treasury consisting of the personal insignia, valuables and ornamental vessels was established. The assets of the Crown Treasury, augmented by diplomatic gifts and royal bequests, including the last will of Sigismund Augustus, were not on public display.