Pisa Tower vs Shanghai World Financial Center

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The Leaning Tower of Pisa (Italian: Torre pendente di Pisa) or simply the Tower of Pisa (Torre di Pisa [?torre di ?pi?za]) is the campanile, or freestanding bell tower, of the cathedral of this Italian city of Pisa, known globally for its almost 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), following the palace and the Pisa Baptistry. The height of this 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 feet 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 building 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 decreased the tilt to 3.97 degrees.

Source: Wikipedia

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The Shanghai World Financial Center (SWFC; Chinese: ????????) is a supertall skyscraper located in the Pudong district of Shanghai. It was designed by Kohn Pedersen Fox and developed by the Mori Building Company, with Leslie E. Robertson Associates as its structural engineer and China State Construction Engineering Corp and Shanghai Construction (Group) General Co. as its primary contractor. It is a mixed-use skyscraper, comprising offices, hotels, conference rooms, observation decks, and ground-floor shopping malls. Park Hyatt Shanghai is the tower's hotel element, comprising 174 rooms and suites occupying the 79th to the 93rd floors, which at the time of completion was the highest hotel in the world. It is currently the third-highest hotel on earth after the Ritz-Carlton, Hong Kong, which occupies floors 102 to 118 of the International Commerce Centre.On 14 September 2007, the skyscraper was topped out and is 492 meters (1,614.2 feet ), which makes it the 12th tallest building in the world and the fourth tallest structure in Mainland China. The SWFC opened to the general public on 28 August 2008, with its observation deck opening on 30 August. The observation deck offers views from 474 m (1,555 feet ) above ground level.The SWFC was lauded for its design, and in 2008 it was named by architects as the year's best-completed skyscraper. In 2013, the SWFC was exceeded in height by the adjoining Shanghai Tower, which will be China's tallest structure as of 2017. Collectively, The Shanghai World Financial Center, The Shanghai Tower and The Jin Mao Tower form the world's first adjoining grouping of three supertall skyscrapers.

Source: Wikipedia