The name "Treasury" is attributed to oral tradition but we don't know if it is related to its original use.
It has a rectangular floor plan and is divided by a colonnade into two elongated spaces. Together with the building that was formed in the church of Agioi Anargyroi, it belonged to the west transept of the Ali Pasha's Saray.
It houses a permanent exhibition of silversmithing. Its premises feature aspects of the art of silversmithing, which had undergone great development throughout Epirus, from the late Byzantine years up to the present day. The exhibition includes collections of Archbishop Spyridon, of Konstantinos Ioannidis and Titica Velli- Dogoritis, highlighting their secular and ecclesiastical character and techniques.
It operates as a branch of the Byzantine Museum of Ioannina.