Palaces, gardens, churches, hospitals and castles with historic ties to the Ducal House of Medinaceli make up an extensive and diverse heritage, the conservation of which is one of the Foundation's chief aims.
Of these monuments, which are scattered across Spain, the four most artistically and historically significant are open to the visitors under conditions that guarantee their integrity. The aim is to make them known to the public and to allocate the income from visits to the upkeep of all the buildings and their collections and settings, as these funds are used entirely for this purpose.