 The firm was founded in 1929 and became known as Thompson Coburn in 1996 through the merger of two St. Louis firms, Thompson & Mitchell and Coburn & Croft.In July 2007 Thompson Coburn completed a merger with Fagel Haber of Chicago, giving the firm its first outpost in the Windy City.In December 2009 and January 2010, 10 attorneys from the Chicago law firm of Schain, Burney, Ross and Citron joined the firm, strengthening its client services in the area of Land Use Real Estate Law.