Guittone d'Arezzo

Guittone d'Arezzo (Arezzo, c. 1235 – 1294) was a Tuscan poet and the founder of the Tuscan School. He was an acclaimed secular love poet before his conversion in the 1260s, when he became a religious poet. In 1256, he was exiled from Arezzo due to his Guelf sympathies.

Lettere di Fra Guittone d'Arezzo, 1745 edition

...
Wikipedia