Seville | |
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State | |
Country | |
Capital | |
Population | 704198 |
Seville (; Spanish: Sevilla [seˈβiʎa] (listen)) is the capital and largest city of the Spanish autonomous community of Andalusia and the province of Seville. It is situated on the lower reaches of the River Guadalquivir, in the southwest of the Iberian Peninsula.
Seville has a municipal population of about 690,000 as of 2016, and a metropolitan population of about 1.5 million, making it the largest city in Andalusia, the fourth-largest city in Spain and the 30th most populous municipality in the European Union. Its old town, with an area of 4 square kilometres (2 sq mi), contains three UNESCO World Heritage Sites: the Alcázar palace complex, the Cathedral and the General Archive of the Indies. The Seville harbour, located about 80 kilometres (50 miles) from the Atlantic Ocean, is the only river port in Spain. Seville experiences high temperatures in the summer, with daily maximums routinely above 35 °C (95 °F) in July and August.
Seville was founded as the Roman city of Hispalis. It became known as Ishbiliyah after the Muslim conquest in 711. During the Muslim rule in Spain, Seville came under the jurisdiction of the Caliphate of Córdoba before becoming the independent Taifa of Seville; later it was ruled by the Muslim Almoravids and the Almohads until finally being incorporated into the Christian Kingdom of Castile under Ferdinand III in 1248.
Cobalt | |
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State | Ontario |
Country | Canada |
Capital | |
Population | 1128 |
Cobalt is a chemical element with the symbol Co and atomic number 27. Like nickel, cobalt is found in the Earth's crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal.
Cobalt-based blue pigments (cobalt blue) have been used since ancient times for jewelry and paints, and to impart a distinctive blue tint to glass, but the color was later thought to be due to the known metal bismuth. Miners had long used the name kobold ore (German for goblin ore) for some of the blue-pigment-producing minerals; they were so named because they were poor in known metals, and gave poisonous arsenic-containing fumes when smelted. In 1735, such ores were found to be reducible to a new metal (the first discovered since ancient times), and this was ultimately named for the kobold.
Today, some cobalt is produced specifically from one of a number of metallic-lustered ores, such as cobaltite (CoAsS). The element is, however, more usually produced as a by-product of copper and nickel mining.