H2L2

H2L2 (for three decades, officially Harbeson, Hough, Livingston & Larson) is an architecture firm in Philadelphia founded in 1907 by Paul Philippe Cret as The Offices of Paul Philippe Cret.

In 1925 the firm was joined by Roy Larson.

In 1976, the firm officially became H2L2 after years of using the name informally.

[2] In 2012, H2L2 and NELSON, which was founded in 1977 as an interior design firm, merged to create a full-service architecture/engineering firm.

[3] Much of the firm's work is visible in Philadelphia and around the country.