Francesco Talenti is the one who finished the Campanile
Here you see the first statue of St. John the Evangelist from the niche of the Art in Orsanmichele, attributed to Simone di Francesco Talenti (1377) and today in the hospital of the Innocents.
These great masters left us no self-portraits, nor did their disciples or successors produce works that show their faces. What we see today are only supposed images of them, made decades later. Sometimes, however, it is assumed that they showed their faces in a character in their works, or in the works of their successors.
Thus, it is believed that Francesco Talenti is represented in the statue of St. John sculpted by his son, Simone.