By proclaiming an architectural object for a cultural monument, the protection authorities are faced with a number of dilemmas concerning its preservation. The valid Cultural Property Law leaves many issues open for individual interpretations. The problem of treating the original function of the object under protection is obvious, because it is loosely defined by the Law, but also because it represents a significant aspect of the building's architectural authenticity. Among various examples from practice, a case study of the Department Store in Belgrade is highlighted. This building was constructed in the Secession style. Beside the undoubtedly high level of its artistic significance, it has an important socio historical value, primarily as a symbol of introduction of new architectural programs into the Belgrade architecture. The Department Store was the first of its kind in Belgrade. Since the time of its construction in 1907 until the beginning of this decade, its original purpose has remained unchanged. Today, it functions as a hospitality facility. In this paper, the above procedure is considered, both from the aspect of cultural heritage theories and its meanings in the social context.