The Leaning Tower of Pisa, Italy

The Leaning Tower of Pisa, Italy

The leaning Tower of Pisa is the freestanding bell tower of the cathedral of the Italian city of Pisa. Famous for its unintended tilt, the 56m tower took nearly 200 years to build — work started in 1173. Five years later it started tilting. The tilt was noticeable as workers built the second floor.
https://www.opapisa.it/en/square-of-miracles/tower/