Simplify the following text for a Grade 7 native English-speaking person.
Original: Dante Alighieri , or simply Dante ( May 14\/June 13 1265 - September 14 , 1321 ) , was an Italian poet from Florence .
Simplified: Durante degli Alighieri ( May\/June c. 1265 â `` September 14 , 1321 ) , commonly known as Dante , was a major Italian poet of the Middle Ages .