Il macigno (The Rock) is an Italian opera in two or three acts, music by Victor de Sabata and libretto by Alberto Colantuoni, It was first performed in Milan, on March 31, 1917. Then in 1935 in Turin, the work was renamed with the title changed to Driada, unfortunately the score disappeared in the fire bombing of the World War II in Milan in 1943, but remained a score for voice and piano, and the complete libretto.