History of Madrid "Madrid" evolved from the Mozarabic "Matrit", which is still in the Madrilenian gentilic. The site of modern-day Madrid has been controlled since prehistoric times, and archaeological research found a small Visigothic village nearby. In the mid-9th century, Muhammad I of Córdoba constructed a small castle where the Palacio Real stands today. The Moors built a citadel, al-Mudayna, around this castle. They named the area after the nearby Manzanares River, which the Muslims called al-Majrīṭ (Arabic: "source of water"). From this came the name "Majerit", later spelled "Madrid". The Moors controlled the citadel until Alfonso VI of León and Castile conquered
Madrid on 16 January 1945 at . These records were registered at the airport, in the eastern side of the city. Precipitation is concentrated in the autumn and spring, and, together with Athens which has similar annual precipitation, is the driest capital in Europe. It is particularly sparse during the summer, taking the form of about two showers and/or thunderstorms during the season. Madrid derives almost 73.5 percent of its water supply from dams and reservoirs built on the Lozoya River, such as the El Atazar Dam, which was built in 1972 and inaugurated by Francisco Franco. This water supply is