Pisa Tower vs First Canadian Place

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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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First Canadian Place (originally First Bank Building) is a skyscraper in the Financial District of Toronto, Ontario, in the northwest corner of King and Bay streets, and serves as the global operational headquarters of the Bank of Montreal.

At 298 m (978 ft), it is Canada's tallest skyscraper and the 15th tallest building in North America to structural top (spires) and 9th highest to the roof top, and the 105th tallest in the world. It's the third tallest freestanding construction in Canada, after the CN Tower (also in Toronto) and the Inco Superstack chimney in Sudbury, Ontario. The building is owned by Brookfield Office Properties, setting it in co-ownership with the neighbouring Exchange Tower and Bay Adelaide Centre as well as various other office areas across Downtown Toronto.

Source: Wikipedia