The Leaning Tower of Pisa was built over a period of about 200 years beginning in 1173. The original architect is unknown, but the most commonly credited early architect is Bonanno Pisano, who began its construction. Giovanni di Simone was the engineer who resumed construction in 1272 and managed to build several more floors despite the lean, while Tommaso Pisano finished the tower in 1372. The tower was commissioned by the Catholic Church and various architects, engineers, and workers contributed over the centuries to its construction and completion.
In summary:
- Initial construction started in 1173, likely by Bonanno Pisano (though some suggest Gherardo di Gherardo was involved early on).
- Giovanni di Simone took over in 1272 and continued the work despite the tower's tilt.
- Tommaso Pisano finished the tower in 1372.
- The project was commissioned and funded by the Catholic Church.
Thus, no single person can be credited solely; it was the work of multiple architects and engineers over centuries.
