The leading tower of Pisa, also known as the Tower of Pisa, is a free standing bell tower next to the Church of the Italian city of Pisa. The Tower is located behind the church and is said to be the third oldest structure in Pisa. The tower was made to stand straight, however immediately after it was constructed, it started leaning towards the south east due to a weekly laid foundation and substrate that allows the foundation to change direction.

The total height of the tower is 186.27 feet from the ground towards the lower side and 186.02 feet on the higher side. Its width from the bottom is measured 13 plus feet and 8 plus feet from the top. The Towers total weight is 14,500 metric tons and has 296/294 steps.