The paper begins with the introductive elaboration of the central concept of Museum activity, as well as the function of the Varaždin City Museum and its Archaeological Department. A general historical review of the Museum is then presented, while the history of the Department itself is based on the activities of its first curator, Stjepan Vuković. Both reviews are concluded with the contemporary state of the institution and its current mission. The analysis of the Department’s Museum activity begins with the presentation of eight collections divided into four groups depending on the criteria for defining the aggregate entity of Museum objects. Museum activity is closely related to the processes of Collection management and is presented by list of activities in contemporary institutional and public spheres. Institutional activities cover collection, protection, documentation and professional work, while public activities present public relations and exhibition activities. As extracting objects from Department collections is also a part of Collection management, the process is also listed and explained in contemporary actions. Instead of the conclusion, problems of the so-called communication noise between the Archaeological Department and the public are presented in form of a lack of a permanent exhibition and are addressing the regulations related to public access to collections.