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Round city of Baghdad. Baghdad was founded on 30 July 762 CE. It was designed by Caliph al-Mansur. [1] According to 11th-century scholar Al-Khatib al-Baghdadi in his History of Baghdad, [2] each course of the city wall consisted of 162,000 bricks for the first third of the wall's height.
The metaphor of a golden age began to be applied in 19th-century literature about Islamic history, in the context of the western aesthetic fashion known as Orientalism.The author of a Handbook for Travelers in Syria and Palestine in 1868 observed that the most beautiful mosques of Damascus were "like Mohammedanism itself, now rapidly decaying" and relics of "the golden age of Islam".
A major contribution from the House of Wisdom in Baghdad is the influence it had on other libraries in the Islamic world. It has been recognised as a factor that connected many different people and empires because of its educational and research components.
The Tusi couple, a mathematical device invented by the Persian polymath Nasir al-Din Tusi to model the not perfectly circular motions of the planets. Science in the medieval Islamic world was the science developed and practised during the Islamic Golden Age under the Abbasid Caliphate of Baghdad, the Umayyads of Córdoba, the Abbadids of Seville, the Samanids, the Ziyarids and the Buyids in ...
] By the 11th century, Baghdad became almost the exclusive name for the world-renowned metropolis. Christophe Wall-Romana has suggested that al-Mansur's choice to found his "new city" at Baghdad because of its strategic location was the same criteria which influenced Sargon's choice to found the original city of Akkad in the exact same location.
The Abbasid Caliphate first centered its government in Kufa, modern-day Iraq, but in 762 the caliph Al-Mansur founded the city of Baghdad, near the ancient Babylonian capital city of Babylon. Baghdad became the center of science, culture and invention in what became known as the Golden Age of Islam.
The Lebanese Hadith scholar, Gibril Haddad stated: [9] "Tarikh Baghdad ("History of Baghdad"), his most important work. Ostensibly a history of Baghdad, it is more specifically a reference work in narrator-authentication (‘ilm al-rijâl) and a valuable compendium of 4,385 hadiths narrated with their full chains, over half of them (2,253) not found in the two books of Sahih and the four Sunan.
An important influence in the development of cartography was the patronage of the Abbasid caliph al-Ma'mun, who reigned from 813 to 833. He commissioned several geographers to perform an arc measurement , determining the distance on Earth that corresponds to one degree of latitude along a meridian ( al-Ma'mun's arc measurement ).