Living between the 15th and 16th century, Aldo Manuzio, friend of Pietro Bembo and Erasmus of Rotterdam, was one of the greatest innovators in the field of typography, perfecting punctuation and introducing italic characters as well as the octavo format, the ancestor of modern paperbacks. All of these features, known as "Aldine editions," still constitute one of the most important bequeathals in the history of printed book.