John Hancock Center vs Pisa Tower

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875 North Michigan Avenue, formerly the John Hancock Center, is a 100-story, 1,128-foot supertall skyscraper located in Chicago, Illinois. Located in the Magnificent Mile district, its title was changed to 875 North Michigan Avenue on February 12, 2018. However, despite this, the building is still colloquially referred to as the John Hancock Center. It had been built under the supervision of Skidmore, Owings and Merrill, with Peruvian-US chief designer Bruce Graham and Bangladeshi structural engineer Fazlur Rahman Khan. When the building topped out on May 6, 1968, it was the second-tallest building in the world and the tallest outside New York City. It's currently the fourth-tallest building in Chicago and the ninth-tallest in the USA, after One World Trade Center, the Willis Tower, 432 Park Avenue, the Trump Tower Chicago, the Empire State Building, the Bank of America Tower, 30 Hudson Yards and the Aon Center. When measured to the top of its antenna masts, it stands at 1,500 feet (457 m). The building is home to many offices and restaurants, in addition to about 700 condominiums.

It also Includes the third-highest residence in the world, after the Burj Khalifa in Dubai and the Trump Tower in Chicago. The building was named for John Hancock Mutual Life Insurance Company, a developer and original tenant of the building. In 2018, John Hancock Insurance requested that its name be removed and the owner is seeking another naming rights deal.From the 95th floor restaurant, diners can look out at Chicago and Lake Michigan. The observatory (360 Chicago), which competes with the Willis Tower's Skydeck, has a 360° view of town, up to four states, and a space of over 80 miles (130 km). 360 Chicago is home to TILT, a moving platform that welcomes visitors across the edge of the skyscraper to a 30-degree angle, a full bar with local collections, Chicago's only open-air SkyWalk, and also features free interactive high definition touch screens in six languages. The 44th-floor sky lobby features America's highest indoor swimming pool.

Source: Wikipedia

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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