Cairo Tower | |
|---|---|
Height | 187m |
| Floors | 90 |
| Year | 1956 |
| City | Cairo |
The Cairo Tower (Egyptian Arabic: ??? ???????, Borg El-Q?hira) is a free-standing cement tower in Cairo, Egypt. In 187 m (614 ft), it has been the tallest structure in Egypt and North Africa for approximately 50 years. It was the tallest structure in Africa for ten years before 1971, when it was surpassed by Hillbrow Tower in South Africa.
Pisa Tower | |
|---|---|
Height | 56m |
| Floors | 0 |
| Year | 1173 |
| City | Pisa |
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.
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