Shaklee Terraces, San Francisco, designed in 1982 with a flush aluminum and glass facade and rounded corners.
Skidmore, Owings and Merrill LLP (SOM) is a Chicago-based architectural firm that was formed in 1936 by Louis Skidmore and Nathaniel Owings; in 1939 they were joined by John Merrill. They opened their first branch in New York City, New York in 1937. SOM is one of the largest architectural firms in the United States. Their primary expertise is in high-end commercial buildings, as it was SOM that led the way to the widespread use of the modern international-style or "glass box" skyscraper.
Many of SOM's post-war designs have become icons of American modern architecture, including the Lever House (1952) in New York City; the Air Force Academy Chapel (1958) in Colorado Springs, Colorado; and the John Hancock Building (1969) and Sears Tower (1973), both in Chicago.
The firm has been recently questioned for its win of the contract to design the Freedom Tower, replacing the destroyed World Trade Center in Manhattan. After Daniel Liebeskind won the competition for master-planning, SOM was awarded the architectural design contract for the Freedom Tower, after having withdrawn their entry in the original design competition.