The Construction of the Leaning Tower of Pisa: Materials Used

The Construction of the Leaning Tower of Pisa: Materials Used

The Leaning Tower of Pisa is one of the most iconic monuments in the world. Located in the Italian city of Pisa, it is an architectural marvel and a symbol of the city. But what is it made of?

The Construction of the Tower

The tower was originally built as a bell tower for the cathedral of Pisa in 1173. It was designed by Bonanno Pisano, a master architect from Pisa. The construction of the tower was halted in 1178 due to the soft ground of Pisa, causing it to begin to lean. After a few attempts to fix the tilt, the tower was eventually completed in 1350.

The Materials Used in the Tower

The Leaning Tower of Pisa is built from white marble and is estimated to weigh around 14,500 tons. The tower is composed of seven different stories, each made of marble blocks that are held together by mortar. The tower also has a series of arches and columns that help support its structure. In addition, the tower is also reinforced by iron beams.


The marble used in the construction of the tower was sourced from the Carrara region of Italy, located near the city of Pisa. This type of marble is known for its white color and its ability to withstand harsh weather conditions. The marble blocks were cut into rectangular shapes and were used to build the walls and the floors of the tower.


The mortar used to hold the marble blocks together was a mixture of lime, sand, and water. This mixture was strong enough to withstand the weight of the marble blocks, as well as the effects of time and weather.

Iron Beams

The iron beams that are used to reinforce the structure of the tower were added in the 19th century. The beams were added to help stabilize the tower and to prevent it from collapsing. The iron beams are also visible from the outside of the tower, as they are painted in a reddish color.


The Leaning Tower of Pisa is an iconic structure that has stood for centuries. It is made from white marble, mortar, and iron beams that help support its structure. The tower is a testament to the engineering and architectural skills of the people of Pisa, and it is a symbol of the city that is admired by people around the world.

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