The second part of the museum is sited in a deeper way, with more and shorter stripes. This big part shelters the main exhibition area. A great library is sited at the end of this body, in part imbibed in a medieval building, with an independent access as well as communicated with the rest of the complex. The roofs of the different stripes are created according to a unique logic, following different rhythms and peaking different heights according to the space´s functional necessities. All the stripes have a metallic enclosure with open parts providing roof-light when necessary and selected points of view. A metallic grid covers the building acting as louvres or adopting a less dense configuration allowing the sun to get into. This metallic grid helps to make the building energetically efficient