The design strategy is inspired by the engravings of the Basque artist Eduardo Chillida and aims to create variation through the following actions: first, through the balance between repetition and difference; second, through the alternation of full and empty spaces; and, third, through the treatment of light.
With regard to the first, the balance is achieved through the repetition of the internal units and a perimeter that surrounds them, which sometimes exceeds the useful space to create internal patios. Regarding the second, the balance between empty and full spaces is achieved by separating the units with narrow interstitial spaces that create secondary
roads, framed views, and, on occasions, unexpected circulations.
Finally, the Plan itself is subdivided into clusters that differ from each other by their remoteness or proximity to the thermal pool, in such a way that the children with extreme difficulties (physical and cognitive) have the most advantageous position and proximity to it – due to the recurrence in its use.

The articulation of the complex to the surrounding neighborhood occurs in two key points: at the main entrance, next to the administration, and at the entrance near the chapel. Both places are marked by towers that not only play an active role as visual points of orientation but also symbolize the civil and religious powers that stand behind the foundation.