H2L2 is an architecture firm in Philadelphia founded in 1907 by Paul Philippe Cret as The Offices of Paul Philippe Cret. In 1923, John Harbeson became Cret's partner, along with William J. H. Hough and William Livingston. In 1925 the firm was joined by Roy Larson. After Cret's death in 1945, the younger partners followed Cret's wishes and removed Cret's name from their masthead, continuing as Harbeson, Hough, Livingston & Larson. In 1976, the firm officially became H2L2 after years of using the name informally. In 2012, H2L2 and NELSON, which was founded in 1977 as an interior design firm, merged to create a full-service architecture/engineering firm.
Much of the firm's work is visible in Philadelphia and around the country.
The Offices of Paul Philippe Cret
- 1910 – Organization of American States Building, Washington, DC (with Albert Kelsey)
- 1913 – Indianapolis Central Public Library, Indianapolis, Indiana (with Zantzinger, Borie and Medary)
- 1921 – Detroit Institute of Arts, Detroit, Michigan (with Zantzinger, Borie and Medary)
- 1923 – Barnes Foundation, Merion, Pennsylvania
- 1926 – Rodin Museum, Philadelphia, Pennsylvania (with Jacques Gréber
- 1926 – Benjamin Franklin Bridge, Philadelphia – Camden, New Jersey
- 1929 – Clark Memorial Bridge, Louisville, Kentucky
- 1929 – Integrity Trust Company Building, Philadelphia
- 1932 – Folger Shakespeare Library, Washington D.C.
- 1935 – Duke Ellington Bridge, Washington D.C.
- 1937 – Eccles Building, Washington D.C.
- 1944 – Bancroft Hall, USNA, Annapolis, Maryland
Harbeson, Hough, Livingston & Larson
- 1944 – Normandy American Cemetery and Memorial, Colleville-sur-Mer, Normandy, France
- 1956 – Eisenhower Chapel, Penn State University, State College, Pennsylvania
- 1959 – Walt Whitman Bridge, Philadelphia, Pennsylvania
- 1963 – Thomas Jefferson University, General Plan, Philadelphia
- 1965 – Rayburn House Office Building, Washington, DC
- 1970 – Thomas Jefferson University, Scott Memorial Library, Philadelphia
- 1970 – PECO Building, Philadelphia
- 1972 – Children's Hospital of Philadelphia, Philadelphia
- 1976 – Hetzel Student Union, Penn State University, State College
- Founded by Cret
- Name changes
- Timeline of major works
- "A Modest Proposal: Some Rejected and Altered Architectural Designs for TJU Campus Buildings" on the Thomas Jefferson University website
- CHoP designed by H2L2 (h2l2.com refers to this as the "Children's Hospital of Pennsylvania")
- Media related to Harbeson, Hough, Livingston & Larson at Wikimedia Commons
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