The treasury extends over two floors and is the size of a hall. The building comes from the second half of the 17th century. The portal with polished stone walls is made of red Spitaler marble and the entrance door is decorated on both sides with magnificent inlays made of different woods. Also, the fittings and the magnificent box lock on the inside of the door are worth seeing.

The bright room, which is richly structured by twelve niches and has seven windows, is covered by a pentagonal vaulted five-aisle vaulted with stucco work. The punches allow additional illumination of the vault through twelve round skylights. The stucco work was done in 1679 by the plasterers Lorenzo Canevale and Thomas Ferrada. Canevale counted in Upper Austria to the circle of Italian Baroque artists.

In the lower part of the enclosing walls, the plasterers built 14 double pilasters with Corinthian capitals, decorated with busts, fruits, oak or acanthus leaves, apparently bearing the two cornices and the vault. On closer examination it is noticeable that on most double piledrians one female and one male bust are represented, twenty of these busts have feathered wings. In contrast, there are eight heads with bat-like wings in the other capitals: on the narrow side to the west an elderly man with a flowing beard and an elderly woman with a strange ground cover. To the east a man with a turban and a bareheaded woman, in the middle of the south side a moorish head with a turban and a woman with beaded bonnet, on the right of it two women's heads. It is unusual that all eyes of the angel's heads have large black pupils.

Other attractions include nine sumptuous cupboards from the end of the 17th century dar. The cabinets are all nußhozfurniert and similarly structured, but differ in various details.

In these cupboards are kept various valuable objects: artistically embroidered vestments, paraments and other liturgical tools, several relics surrounded by valuable monastic work in carved and gilded shrines, and the Rococo-born "Spitaler Krippe" in its magnificent enclosure.