Pope from c. 107 to c. 116, St. Alexander was a Roman and is said to have been a student of Pliny the Younger. Little is known about Alexander, although legends say that he converted his jailer, St. Quirinus, and his daughter, St. Balbina. Alexander is also supposed to have introduced the custom of blessing houses with salt and water. He is also supposed to have introduced the commemoration of the Last Supper into the mass.