Complex sentence: Established by Hugh Hardy, Malcolm Holzman and Norman Pfeiffer in 1967 in New York, HHPA was noted for its innovative public buildings, and received over 100 national design awards, including the American Institute of Architect's Architecture Firm Award in 1981.
Split into simpler sentences: Established by Hugh Hardy, Malcolm Holzman and Norman Pfeiffer in 1967 in New York, HHPA was well known especially for its innovative public buildings. HHPA received over 100 national design awards, including the AIA's Architecture Firm Award in 1981.