Abstract
The Office of the Havana City Historian, the main developer of Old Havana now, was founded in 1938, as the heritage safeguarding labor. Economic crisis which had come in early 90's pushed the determination of the State which promoted to redevelop Old Havana as the area of tourism. In 1993, the Council of State passed the Law-Decree number 143 laying the grounds to transform the rehabilitation, from a state-subsidized activity, to a self-financing process which could even provide a share of the utilities to the national budget. The Office establishes it's self-financing mechanisms, and expands interventional strategy. This strategy is associated to the system of traditional centrality of Old Havana: the system of 5 main squares and small squares, whose apparent dispersion in the urban web will provide the reactivation of residential surroundings and the strengthening of habitat's services.