One of the first pre-cast curtain wall buildings in New York designed by Emery Roth & Sons, Pietro Belluschi and Walter Gropius and completed in 1963. BCA researched the feasbility of listing the MetLife Building on the National Register of Historic Places. BCA designed and oversaw the cleaning of the exposed aggregate concrete curtain wall. The dramatic results were easy to see. The concrete went from being the same color as the building's tinted windows to starkly contrasting from the tinted windows.