1. Construction: The construction of the tower began in 1173 and took over two centuries to complete. It was originally intended to be a freestanding bell tower for the adjacent Pisa Cathedral. 2. Architect: The architect behind the tower's design is still uncertain, with several theories suggesting it could be Bonanno Pisano or Diotisalvi. 3. Leaning: The most distinctive feature of the tower is its noticeable lean. The tilt began during construction due to an inadequate foundation on soft ground. The lean continued to increase until it was stabilized in the late 20th century. 4. Measurements: The tower stands at a height of approximately 56 meters (186 feet) on the highest side and about 55.86 meters (183.27 feet) on the lowest side. It has an inclination of about 3.99 degrees. 5. Structure: The tower consists of eight stories and is made primarily of white marble. It features a cylindrical shape with a diameter of about 15 meters (49 feet) at the base and 8.7 meters (28.5 feet) at the top.

6. Bells: The tower houses seven bells, with the largest one weighing over three tons. These bells were used to signal important events and mark the time. 7. Closure: In 1990, due to concerns about its stability and safety, the tower was closed to the public for restoration work. It remained closed for over a decade and reopened in 2001 after extensive efforts to stabilize its lean. 8. UNESCO World Heritage Site: The Leaning Tower of Pisa, along with the Piazza dei Miracoli (Square of Miracles) where it is located, was declared a UNESCO World Heritage Site in 1987. 9. Visitors: The tower attracts millions of visitors from around the world each year. Climbing the tower is a popular activity for tourists, providing them with a unique perspective and stunning views of Pisa. 10. Cultural Symbol: The Leaning Tower of Pisa has become an iconic symbol of Italy and is recognized worldwide. Its distinctive lean has made it a subject of fascination and curiosity for centuries, making it one of the most famous architectural structures in the world.