Ennead is a New York City architecture firm best known for ambitious public buildings, like the Clinton Presidential Library, in Little Rock, Ark., the Newseum, in Washington, D.C., and the Standard Hotel in New York City. Formerly called Polshek Partnership Architects and founded by the architect James Polshek in 1963, Ennead transitioned to its new identity in 2010. Today it has 11 partners and 180 employees, and it has expanded its reach to include artful solutions to vexing urban design problems. In New York, the architects turned a wastewater treatment plant into something that looks like sculpture. In Boston, the firm made an awkwardly shaped construction site elegant by hanging a transparent building over the street. The newly formed Ennead Lab is a consultancy of sorts conceived to apply architectural thinking to global challenges. The lab has partnered with the UN to rethink refugee settlements, worked with the Audubon Society to develop a protocol for bird-friendly glass, and helped the nonprofit Heroic Food create a housing plan for the military veterans it serves.