Skidmore, Owings & Merrill
Skidmore, Owings & Merrill LLP (SOM) is an American architectural, urban planning, and engineering firm. It was formed in Chicago in 1936 by Louis Skidmore and Nathaniel Owings; in 1939 they were joined by John O. Merrill.
SOM is one of the largest architectural firms in the world. They have designed several of the tallest buildings in the world, including the John Hancock Center (1969, second tallest in the world when built), Willis Tower (1973, tallest in the world for over twenty years), and Burj Khalifa (2010, currently the world's tallest building).
- Adams, Nicholas. "Skidmore, Owings & Merrill: The Experiment since 1936." Milan: Electa. 2006.