In this thesis the process of restoration and conservation of archaeological metal objects found on the sites in Sisak, Đakovo and Osijek will be described. Starting from an archaeological context, the concept of archeology will be further explained; its history and its development in Croatia. The ways of living in ancient Roman provinces on the Croatian teritory will be described, focusing on metal processing of that period. One of the focal points of this thesis is the description of archeological sites on which these objects were found, especially focusing on objects made from copper and its alloys. Hence why a separate chapter will be dedicated to a more detailed description of these metals, their chemical and physical properties and their reactions to certain stimulants. In the second part of the thesis, we shall explain the causes of deterioration in metals aka the processes of corrosion. Aside from the most common types of corrosion, the least favorable type, „bronze disease“, will be mentioned, its cause and the process of destruction of this alloy. In the central part of the thesis I will describe the mere conservation and restoration process aka the methods of removing the surface impurities and deposit corrosion, as well as methods of stabilisation and consolidation of archeological artefacts. In the final part of the thesis, we have suggested some possibilities of storing and showing of objects in their ideal microclimate conditions, as well as an annex of photographs of selected objects – before and after the conservation-restoration procedure.