The article "Del Gran Tour al turismo de masas", written by Ricard Pié, Josep M. Vilanova and Purificación Díaz, focuses on the evolution of tourism in Europe. The Grand Tour was the origin of tourism in the XVIIth century, although at that time it was limited to the aristocracy. It was not until mid xxth centrury that working class started to enjoy tourism as a leisure activity. Nowadays, tourism has turned into a global phenomenon whose significance in world economy is crucial.