The collection of metal items and bells with over seven thousand objects is one of the Museum's most numerous and most comprehensive collections. It consists of a number of smaller collections that may be regarded as separate units owing to their quality and scope.

The collection of profane precious metal objects, primarily silver, illustrates the style and morphological development of utility objects from the Gothic period to the 20th c. They were manufactured mostly by local masters or by those from major European centres, some of them representing top achievements of their period. The collection includes tableware, cutlery, candle-sticks, various containers, different precious metal items, and the like.

Liturgical items constitute an extremely precious part of the metal objects collection. They originate mostly from the Roman Catholic churches of northern Croatia. There is also the Judaica collection consisting of about a hundred items of the Jewish religion art.

The bells collection includes about eighty church-bells from the territory of Croatia and Slavonia salvaged from being melted during WWI owing to the efforts of dr. Viktor Hoffler and prof. Vladimir Tkalcic. They entered the collection in 1916 and 1917. The oldest bells originate from the 14th c., while the entire collection provides a good review of bell smelting from the 14th to the 20th c. The stress has, of course, been put on the history of local Zagreb bell smelters from the end of the 17th to the end of the 19th c.

The wrought and cast iron collection is also very valuable, particularly the parts of Zagreb's cathedral and of the former Paulist friary in Remete, as well as utility iron objects from the Gothic period until the 20th c.

Objects made of bronze and brass constitute units apart, with several early examples of mortars, as well as a small collection of brass platters. Copper is mostly represented in the works of local masters.

The tin collection is another significant part of the holdings. The preserved objects reflect the importance of tin use in everyday life, particularly during the 17th and 18th c.

The jewelry collection is relatively small, but contains some very beautiful antique jewelry pieces, mostly from the 19th c.