Religious tourism is that type of tourism whose participants are motivated either in part or exclusively for religious reasons. Listed here as a separate form, it could just as well be a subgroup of cultural tourism within this classification. On the whole, the differences between the single forms are not clearly definitive, and often one can distinguish transitional forms. Often a journey may have several motivations and other subordinate goals. For example, economic or political tourism often involve aspects of holiday or cultural pursuits. Similar points of transition and contact become evident between religious tourism, on the one hand, and holiday, cultural, economic, and political tourism on the other. Pilgrimages and other religious journeys are tied to other types of tourism, perhaps more closely today than ever before. They are multifunctional journeys even when the religious factors seem to dominate-in industrialized countries more so than in developing countries. This consequence occurs, because in developing countries mass tourism is still at its incipient stage, and for many classes of the population, religious tourism offers the only possibility of travel. This situation is comparable to that in medieval society, where lower and middle classes could not allow themselves longer journeys because of their social and financial situations. Free time was then closely tied to local religious centers.