In the Treasury Gyor bishopric presents liturgical plan. Traditional donors – the bishops, the nobility, was presented to the Church expensive gifts, most of these were items of jewelry, weaving. In the 15th and 16th centuries it was mainly the work of Hungarian artists, and starting with the 18th century until the beginning of the last significant Austrian influence - basically, the Vienna. The most generous donors were the bishops Ferenc Zichy, Janos Simor Janos Zalka. The great value has the rarest collection of Gothic chalices, the earliest of which dated to the early 15th century. The reign of king Matthias presents the cruets to the amazing beauty and complexity filigree, filigree, enamel. In the late 17th century was made one of the most beautiful glory the Treasury, gave her the Patronal feast of the Cathedral of the Bishop Agost Carestel in 1701, the year. Textile exhibits relate to 15-16th centuries – items of Church furnishings and liturgical clothing of the priests.

The Museum library was founded by the merger of two predecessors: the Library of the Theological Seminary, and collections Patronal feast of the Cathedral. The Treasury of the Bishop of Gyor Library now has 67 thousand volumes, 190 pervozdannym books and 362 manuscripts older than 1850. The most valuable book – Corwin - from the library of Matthias Hunyadi, and the largest in Hungary code – Zalka-antiphonale - from Nagyvarad.

In lapidary stone presents fragments of the fortress buildings of the Bishop and Patron Saint of the Cathedral from the middle ages and new time. Especially interesting: the coat of arms of Anjou (14th century), fragments crescitelli font (13th century), Gothic window (15th century), Bishop's coat of arms (16-18 century). In the small hall of the permanent exhibition of the sculptor Ferenc LeBeau.