†Campanile giganteum is a species of exceptionally large fossil sea snail, marine gastropod mollusks in the family Campanilidae. This species dates from the Eocene epoch. With a shell length of 40 to 90 cm or even more than 120 cm this is considered to be one of the largest (lengthwise) species of shelled gastropod that ever lived. It is found mostly in the Paris Basin, France.