the museum building consists of a three-level base building that is closed to the public and provides staff workspace and storage areas. five public, two-story towers on the base are called the north, east, south, west and the exhibitions pavilions. the exhibitions pavilion acts as the temporary residence for traveling art collections and the foundation's artwork for which the permanent pavilions have no room. the permanent collection is displayed throughout the other four pavilions chronologically: the north houses the oldest art while the west houses the newest. the first-floor galleries in each pavilion house light-sensitive art, such as illuminated manuscripts, furniture, or photography. computer-controlled skylights on the second-floor galleries allow paintings to be displayed in natural light. the second floors are connected by a series of glass-enclosed bridges and open terraces, both of which offer views of the surrounding hillsides and central plaza. sculpture is also on display at various points outside the buildings, including on various terraces and balconies. the lower level (the highest of the floors in the base) includes a public cafeteria, the terrace cafe, and the photography galleries.