Conservators are generally trained to work on the tangible components of cultural heritage (mainly historic buildings and sites) as a means of preserving their values and meanings and to transmit them to future generations. The Venice Charter establishes, in Article 5, that “the conservation of monuments is always facilitated by making use of them for some socially useful purpose. Such use is therefore desirable but it must not change the lay-out or decoration of the building”. Tourism plays a prominent role in relation to uses given to cultural heritage; historic monuments and sites are one of the most valuable resources for the development of tourism since they express the identity and cultural traditions of a country, region or town. (Párrafo extraído a modo de resumen)