OPERATIONES: IN PSALMOS IS MARTIN LUTHER’S COMMENTARY ON THE PSALMS, PUBLISHED IN 1519. PICTURED ABOVE IS A COPY THAT WAS OWNED BY “SIGIMUNDUS,” ONE OF LUTHER’S STUDENTS. FOR MORE INFORMATION ABOUT ONE OF THE OLDEST BOOKS HOUSED ON WHEATON’S CAMPUS, VISIT SPECIAL COLLECTIONS, BUSWELL LIBRARY, LOCATED ON THE THIRD FLOOR OF THE BILLY GRAHAM CENTER.