Cologne Cathedral vs Inco Superstack

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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 Inco Superstack in Sudbury, Ontario, with a height of 381 metres (1,250 ft), is the tallest chimney in Canada and the Western hemisphere, and the 2nd tallest freestanding chimney in the world after the GRES-2 Power Station in Kazakhstan. It's also the second tallest freestanding structure of any kind in Canada, behind the CN Tower but forward of First Canadian Place. It's the 40th tallest freestanding structure in the world. The Superstack is situated on top of the biggest nickel smelting operation in the world at Vale's Copper Cliff processing centre in the city of Greater Sudbury. In 2018, Vale declared that the stack will be decommissioned and dismantled beginning in 2020. On July 28, 2020, Vale declared that the stack had been officially taken out of service, but would remain operational in standby mode for two more months as a backup in case of a malfunction in the new system, after which the dismantling of this Superstack will begin. In addition to further reducing sulfur dioxide emissions by 85 percent, the decommissioning of the pile is expected to cut the complex's natural gas consumption in half.

Source: Wikipedia