Ljubljana vs Arch

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Ljubljana (UK: lewb-LYAH-nə luub-lee-AH-nə, US: lewb-lee-AH-nə lee-OO-; Slovene: [ljuˈbljàːna] (listen), locally also [luˈblàːna]; also known by other historical names) is the capital and largest city of Slovenia. It has been the cultural, educational, economic, political and administrative centre. During antiquity, a Roman city called Emona stood in the area. Ljubljana itself was first mentioned in the first half of the 12th century. Situated at the middle of a trade route between the northern Adriatic Sea and the Danube region, it was the historical capital of Carniola, one of the Slovene-inhabited parts of the Habsburg Monarchy.

It was under Habsburg rule from the Middle Ages until the dissolution of the Austro-Hungarian Empire in 1918. After World War II, Ljubljana became the capital of the Socialist Republic of Slovenia, part of the Socialist Federal Republic of Yugoslavia. It retained this status until Slovenia became independent in 1991 and Ljubljana became the capital of the newly formed state.

Source: Wikipedia

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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