In the Republic of Croatia there are increasing numbers of mosaic floors or their preserved parts detached from their original substrates, which are often placed on portable substrates during conservation and restoration works. Among them are the remnants of the floor mosaics from one of the central buildings of the archaeological site of Gardun, known for the Roman military camp of Tilurium. The remains of the mosaic, five of which were discovered during the excavation period between 1997 and 2001, were detached from the original substrate, and in 2006 were placed on new, portable substrates made of aluminum sandwich panels. At the end of the works, the most representative mosaic fragment with partially preserved bull motif decoration is exhibited as part of the permanent exhibition of the Museum of Trilj Region, while the remaining fragments are stored in the depot. The central part of the bull emblem is, as such, exhibited outside its original context and function, and its value is diminished because of the presentation methods. The paper will describe the circumstances and context of laying fragments from Gardun on portable substrates and their current presentation. The mode of presentation will be problematized ; the question of the possibility of returning conserved mosaic fragments to the site and the proposal of self-sustainability through the intermodal application of the multimedia and the fragments will be discussed. By comparing some of the existing positive or negative examples from Croatia and abroad, we will try to determine the guidelines for an adequate future presentation and storage of the fragments from Gardun. The aim of this paper is to focus on the issues faced by majority of the mosaics detached from their original substrates.