Pisa Tower vs Arraya Tower

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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 Arraya Tower is a skyscraper completed in 2009 in Kuwait City, Kuwait.

The tower serves as a grade-A office construction. With sixty storeys, and 300 metres high (using a 45-metre spire), the building was the tallest tower in Kuwait until the construction of Al Hamra Tower in 2011. On January 19, 2010, The Council on Tall Buildings and Urban Habitat (CTBUH) announced that Arraya Tower was the 4th-tallest building completed in 2009. Curtis W. Fentress, FAIA, RIBA, of Fentress Architects, was the primary architect of the building, and Ahmadiah Construction was the primary contractor. The tower complements the Present 130-metre-high Arraya Tower housing offices and the Courtyard by Marriott hotel, as well as the upscale Arraya Shopping Mall and the Arraya Ballroom. Building on the tower began in February 2005, with occupation scheduled for February 2009. As of August 22, 2008, the tower was topped out and the superstructure was complete. Exterior cladding, consisting of white marble, green glass and steel rods, was largely complete. Interior works were well underway and wrapped up in early 2009 in time for the tower's opening.

Source: Wikipedia