Oscar Niemeyer returned to the site of his 1974 building, Castello Branco, to redesign it, producing a twenty-first-century museum of international standard. To the existing building he added a striking annexe in the shape of an eye, constructed from reinforced concrete and mounted on a cubic plinth, and providing the shock factor so characteristic of Niemeyer‘s work. The existing building contains traditional museum facilities, including shops, restaurants and exhibition halls on three levels. The new building, designed for exhibitions and multimedia presentations, is on two floors with ceiling heights varying from 3 to 12 metres (10 to 39 feet), and contains a large exhibition space of 2,100 square metres (22,596 square feet). On the lower level are function areas and a bar, as well as audiovisual presentation spaces. The two buildings are linked by winding ramps. The whole complex initiates a dialogue with its surroundings, integrating with the disused warehouses around it which are now to be used as housing and spaces for courses, workshops and lectures. The whole area is to be turned into a cultural park and an important tourist attraction. The audacious ‘eye‘ structure, with its white rendered shell and diagonally gridded lens, was meticulously detailed using computer programmes to facilitate the demanding six-month construction programme.