The Gallery building, designed by architect A. Lozica, was opened for public in 1976 with the exhibition of the most representative works selected by the author and donor himself.

The new collection, including other works and museum exhibits, as well as a sculpture park, was opened in 1990 and accompanied by a catalogue of the Gallery's permanent collection and holdings. In order to present Augustincic's work as comprehensively as possible, the permanent collection was somewhat altered in 1992. However, the basic concept of the previous collection was kept: a tripartite classification of the indoor collection into public sculptures, intimate sculptures and portraits, and the outdoor collection including several fountains and smaller public monuments turned into a sculpture park.

Antun Augustincic, known to the wider public after his outstanding public monuments, such as Peace, standing in front of the UN Building in New York, and The Monument to the Peasants' Rebellion and Matija Gubec in Gornja Stubica, was thus presented also as a true master of intimate sculptures, particularly women's and children's nudes and torsos, as well as of powerful, both psychologically and sculpturally expressive portraits.