Cologne Cathedral vs Pisa Tower

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<p>Cologne Cathedral (German: Kölner Dom, Formally Hohe Domkirche Sankt Petrus, English: Cathedral Church of Saint Peter) is a Catholic cathedral in Cologne, North Rhine-Westphalia, Germany. </p>It is the seat of the Archbishop of Cologne and of the government of the Archdiocese of Cologne. It is a monument of architecture and German Catholicism and was declared a World Heritage Site in 1996. It is Germany's most visited landmark, bringing an average of 20,000 people every day. In 157 m (515 ft), the cathedral is now the tallest twin-spired church on earth, the 2nd largest church in Europe after Ulm Minster, and the third largest church in the world. It contains the second-tallest spires and is the largest Gothic church in Northern Europe. The cathedral is given the of any church in the world by the towers for both spires that are huge.

The choir has the largest height to width ratio, 3.6:1, of any medieval church.Construction of Cologne Cathedral started in 1248 but was stopped in 1473, unfinished. Work did not restart until the 1840s, and the edifice was completed to its original plan in 1880. Cologne's medieval builders had planned a grand structure to house the reliquary of the 3 Kings and fit its function as a place of worship for the Holy Roman Emperor. Despite having been left incomplete during the medieval period, Cologne Cathedral eventually became unified as"a masterpiece of exceptional intrinsic value" and"a powerful testimony to the strength and persistence of Christian belief in medieval and modern Europe".

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