DECEMBER 2014 CLUE: The relation of the facade and plan in a bank designed by an influential architect spurred Robert Venturi later to cite its “obligation toward the difficult whole .”

ANSWER: The answer to the December 2014 issue’s Guess the Architect is Louis Sullivan, who designed the Farmers & Merchants Union Bank in Columbus, Wisconsin (1919–20), one of a series of this building type executed late in his career.