Knud Lonberg-Holm. Design for the Chicago Tribune Tower Competition, Side elevation with Tribune sign visible, 1922, Vintage photograph mounted on board, 9 1/8 x 4 7/8 inches (23.2 x 12.4 cm) – image, 11 1/2 x 9 1/8 inches (29.2 x 23.2 cm) – board