Have you heard of Leaning Tower of Pisa?
user
The Leaning Tower of Pisa was a bell tower in Pisa, Italy. It was started in 1173 and was completed in 1350. It was originally called the “New Tower”. As with many other European cities, Pisa became a significant center of commerce in Europe, and the tower was designed to advertise Pisa’s wealth.
assistant
How long did it take to complete this tower?
user
The construction of the tower began in 1173 and was completed in 1350. The tower was built during two phases: an initial phase, and then a phase of additions. The first phase was designed and constructed between 1173 and 1177. It was originally 120m tall, with two floors of polygonal masonry. Between 1220 and 1224 a new floor of marble was added, bringing the height to 140m. Then between 1248 and 1253, an additional storey was constructed, bringing the tower’s height to 180m.
assistant
Why is it slanted?
user
It was built in an area that was vulnerable to landslides, and the land has been subsiding since it was built.
assistant
Have you heard of Leaning Tower of Pisa?
user
The Leaning Tower of Pisa was a bell tower in Pisa, Italy. It was started in 1173 and was completed in 1350. It was originally called the “New Tower”. As with many other European cities, Pisa became a significant center of commerce in Europe, and the tower was designed to advertise Pisa’s wealth.
assistant
How long did it take to complete this tower?
user
The construction of the tower began in 1173 and was completed in 1350. The tower was built during two phases: an initial phase, and then a phase of additions. The first phase was designed and constructed between 1173 and 1177. It was originally 120m tall, with two floors of polygonal masonry. Between 1220 and 1224 a new floor of marble was added, bringing the height to 140m. Then between 1248 and 1253, an additional storey was constructed, bringing the tower’s height to 180m.
assistant
Why is it slanted?
user
The tower’s masons constructed it to lean, so that it could be taller and taller. This way, they were able to create a taller structure without it toppling over.
assistant
Have you heard of Leaning Tower of Pisa?