The Carbide & Carbon Building is probably the best known of all the brothers' Chicago commissions. Their other building designs include the original State of Illinois Building at 160 N. LaSalle St. (1924), the Seneca Hotel at 200 E. Chestnut St. (1926), the Bankers Building, aka the Clark-Adams Building (1927), the City-State Building (1927), the Randolph-Wells Building (1928), and the Engineering Building at 205 W. Wacker Dr. (1928), all in Chicago; and the Joliet Chamber of Commerce Clubhouse (1925), the Joliet YMCA Building (1928) and the auditorium of Joliet Township High School (now Joliet Central). Working under the temporarily revived D.H. Burnham Co. name, Burnham Brothers designed the 2,100-seat high school auditorium as part of the school's 1924 addition; the firm was also involved with the school's 1917, 1922 and 1931 additions.