The building geometry is the result of a program analysis and urban context. It has to be clear, easy, undersatandable and intuitive for the users. The program it has been divided according to the privacity degree required, and articulated by the main hall at the ground floor, leaving the extrovert space at the -1 floor as an extention of the public space, meanwhile the introspective space (general collection and offices) remain high ground in a tate of levitation and reflection.