Arch vs Chur

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An arch is a vertical curved structure that spans an elevated space and may or may not support the weight above it, or in case of a horizontal arch like an arch dam, the hydrostatic pressure against it. Arches may be synonymous with vaults, but a vault may be distinguished as a continuous arch forming a roof.

Arches appeared as early as the 2nd millennium BC in Mesopotamian brick architecture, and their systematic use started with the ancient Romans, who were the first to apply the technique to a wide range of structures.

Source: Wikipedia

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Chur (German: [ˈkuːr] or [ˈxuːr]) or Coire (French: [kwaʁ]; Romansh: Cuira [ˈkweːrɐ] (listen) or [ˈkwoi̯rɐ]; Italian: Coira [ˈkɔira]) is the capital and largest town of the Swiss canton of Grisons and lies in the Grisonian Rhine Valley, where the Rhine turns towards the north, in the northern part of the canton. The city, which is located on the right bank of the Rhine, is reputedly the oldest town of Switzerland.

The official language of Chur is Swiss Standard German, but the main spoken language is the local variant of the High Alemannic Swiss German dialect. On 1 January 2020 the former municipality of Maladers merged into Chur.

Source: Wikipedia