Jacopo da Lentini, also known as Giacomo da Lentini or with the appellative Il Notaro, was an 13th-century Italian poet and inventor. He was a senior poet of the Sicilian School and was a notary at the court of the Holy Roman Emperor Frederick II. Jacopo is credited with the invention of the sonnet. His poetry was originally written in literary Sicilian, though it only survives in Tuscan.
Although some scholars believe that da Lentini's Italian poetry about courtly love was an adaptation of the Provençal poetry of the troubadours, William Baer argues that the first eight lines of the earliest Sicilian sonnets, rhymed ABABABAB, are identical to the eight-line Sicilian folksong stanza known as the Strambotto. Therefore, da Lentini, or whoever else invented the form, added two tercets to the Strambotto in order to create the 14-line Sicilian sonnet.
