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The Leaning Tower of Pisa (Italian: Torre Pendente di Pisa or Torre di Pisa, English: Leaning Tower of Pisa) was built in August 1173 as a free-standing bell tower of the Cathedral of the city of Pisa, Italy, located in Piazza del Miracoli, north of the city of Pisa, in the province of Tuscany, Italy.

The large lawns of the Piazza de la Miracoli are dotted with a group of religious buildings: the Cathedral (built in 1063-13th century), the Baptistery (built in 1153-14th century), the bell tower (the Leaning Tower of Pisa) and the Necropolis (built in 1174), all of which are clad in cream marble. The Leaning Tower of Pisa is located behind the Cathedral of Pisa.

The Leaning Tower of Pisa is 55 meters high from the ground to the top of the tower, the width of the bell tower wall on the ground is meters, the width at the top of the tower is meters, the total weight is about 14,453 tons, and the center of gravity is meters above the foundation. The circular foundation has an area of 285 square meters and an average pressure on the ground of 497 kPa. The angle of inclination deviates from the outer edge of the foundation by meters, and the top layer protrudes by meters.

The tilt was first discovered in 1174.

Architectural style: The Leaning Tower of Pisa is undoubtedly an important building in the history of architecture. Its bold circular architectural design had already shown its ingenuity before it was heavily tilted.

Although it is not uncommon for the Italian bell towers of earlier eras to adopt circular foundations, similar examples can be found in Ravenna, Tuscany and Umbria, the Pisa bell tower is considered to be independent of these archetypes, and to a greater extent, it was designed and developed independently of the circular building based on the architectural experience of its predecessors, resulting in a unique Pisa style.

For example, the circular design of the bell tower is thought to correspond to the reflection of the cathedral building on the same side, so it deliberately mimics the curved design of the semicircular apse of the church. What's more, the bell tower is consistent with the emphasis on the circular structure in the square, especially after the laying of the foundation stone of the grandiose baptistery, which is also circular, and the whole square is more like a modern version of the Church of the Resurrection in Jerusalem (anastasis). This kind of design is the best in classic ancient architecture.

The decorative style of the bell tower inherits the classic works of the cathedral and the baptistery, the walls are made of marble or limestone into two shades of white bands, the arches of the half-exposed square columns, the carved doors in the arcades, the long diamond-shaped lattice flat roof, and the walls above the arcades face the sunlight to form a strong contrast between the bright side and the shaded side, giving the illusion that the columns in the bell tower are quite heavy.

A visual continuity is created between the cathedral, the baptistery and the bell tower.

The Leaning Tower of Pisa is located in Piazza Miracolia, north of the city of Pisa, in the province of Tuscany, Italy. The large lawns of the square are dotted with a group of religious buildings: the Cathedral (built in 1063-13th century), the Baptistery (built in 1153-14th century), the bell tower (the Leaning Tower of Pisa) and the cemetery (built in 1278-15th century), all of which are clad in cream marble, each relatively independent but in a unified Romanesque style. The Leaning Tower of Pisa is located behind the Cathedral of Pisa.

The bell tower was built in 1173 and was designed to be built vertically, but soon after the construction began, it was inclined due to the uneven foundation and soft soil, and was completed in 1372 with the tower tilting to the southeast.

The Leaning Tower of Pisa is the symbol of the city of Pisa, and in 1987 it was declared a World Heritage Site by the United Nations Educational, Scientific and Cultural Organization for its influence on Italian architecture from the 11th to the 14th centuries, along with the adjacent cathedral, baptistery and cemetery.

English: The Leaning Tower of Pisa Italian: Torre Pendente di Pisa or Torre di Pisa Geographical coordinates:

43°43' 23"n，10°23' 47"e