Research was undertaken at three levels: urban, conceptual and material. At the urban level, the new building was recognized as a link between interior-exterior, centre and outskirts, old and new, where the past and present meet. At the conceptual level, internal spatial quality was sought as opposed to the neutrality and abstraction of the exterior plain wall of the historical centre. On the inside, opposites were confronted: two autonomous, open-ended lightboxes and linked by the circulation, as opposed to the spatial multiplicity suggested by crossed visions, transparencies, reflections and transgressions. In an area of 41x51m, a special interest in the value of light and matter prevailed, which required a trial and error mechanism until an agreement was reached regarding the materials to be used: concrete, metal, wood and glass.