Montju?c is the result of several, generally partial, urban development operations carried out mainly throughout the 20th century, all enclosed within themselves. For this reason, an overall concept was needed to give the area a cohesive structure. The heights were a particularly marginal area, the last part of the mountain to be preserved from development due to its relative inaccessibility. The Montju?c Heights was a space with a castle in the centre, seen with indifference if not hostility, for its role in several periods of citizenry repression, steep, inaccessible, with few attractions during the day and dangerous after dark. The automobile was practically the only way to get there, and the mass use of private vehicles contradicted the very sense of an area devoted to walks and other leisure activities.