Leaning Tower of Pisa

Leaning Tower of Pisa
Piazza dei Miracoli

The Piazza dei Miracoli (Italian; English: Square of Miracles), formally known as Piazza del Duomo (English: Cathedral Square), is a walled 8.87-hectare area located in Pisa, Tuscany, Italy, recognized as an important center of European medieval art and one of the finest architectural complexes in the world. 

Considered sacred by the Catholic Church, its owner, the square is dominated by four great religious edifices: the Pisa Cathedral, the Pisa Baptistry, the Campanile, and the Camposanto Monumentale (Monumental Cemetery). 

Partly paved and partly grassed, the Piazza dei Miracoli is also the site of the Ospedale Nuovo di Santo Spirito (New Hospital of the Holy Spirit), which houses the Sinopias Museum (Italian: Museo delle Sinopie) and the Cathedral Museum (Italian: Museo dell'Opera del Duomo).

The name Piazza dei Miracoli was coined by the Italian writer and poet Gabriele d'Annunzio who, in his novel Forse che sì forse che no (1910), described the square as the "prato dei Miracoli", or "meadow of miracles". The square is sometimes called the Campo dei Miracoli ("Field of Miracles"). 

In 1987, the whole square was declared a UNESCO World Heritage Site. 

 Leaning Tower of Pisa

The Leaning Tower of Pisa (Italian: Torre pendente di Pisa) or simply the Tower of Pisa (Torre di Pisa) is the campanile, or freestanding bell tower, of the cathedral of the Italian city of Pisa, known worldwide for its nearly four-degree lean, the result of an unstable foundation. The tower is situated behind the Pisa Cathedral and is the third-oldest structure in the city's Cathedral Square (Piazza del Duomo), after the cathedral and the Pisa Baptistry.
The height of the tower is 55.86 metres (183.27 feet) from the ground on the low side and 56.67 metres (185.93 feet) on the high side. The width of the walls at the base is 2.44 m (8 ft 0.06 in). Its weight is estimated at 14,500 metric tons (16,000 short tons). The tower has 296 or 294 steps; the seventh floor has two fewer steps on the north-facing staircase.
The tower began to lean during construction in the 12th century, due to soft ground which could not properly support the structure's weight, and it worsened through the completion of construction in the 14th century. By 1990 the tilt had reached 5.5 degrees. The structure was stabilized by remedial work between 1993 and 2001, which reduced the tilt to 3.97 degrees.

https://en.wikipedia.org/wiki/Leaning_Tower_of_Pisa