They were directed by Giovanni di Simone, the builder of the church of St. Francis and the Camposanto Monumentale (in this cemetery, the young Franz Liszt found inspiration for his immortal concerto "Totentanz").
He took over the construction of the tower from Bonanno Pisano.
Pisano, after his death, was buried at the foot of the Leaning Tower in a sarcophagus discovered in 1820.
