This modernist masterpiece won the American Institute of Architects' gold medal in 1954 and was named one of the best buildings of the year by Architectural Forum magazine, according to Inga Saffron's column in the Philadelphia Inquirer, 3/4/18, at p. H18. It closed in 1989 because of an asbestos problem, and its holdings were moved to the central library on the Benjamin Franklin Parkway in Philly. I remember as a young lawyer going there, as its reference books were used, pre-Web, to see who owned what to determine who to sue, for ex., Company A was an affiliate of Company B, so sue both of them. It is hoped that the building can be saved and refurbished.