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As the power of the Abbasid Caliphate waned during the late 9th century, the numerous de facto autonomous rulers who emerged in the Islamic world such as Ya'qub al-Saffar or Ahmad ibn Tulun added their own names to the coinage underneath that of the caliph, [4] as the last vestige of Abbasid authority, but also as a token of caliphal ...
During the late Abbasid Era, the 28th Caliph, al-Mustazhir (r. 1094–1118 CE), built a new wall around the eastern side of Baghdad to protect it from invading armies and Bedouin raids. Along with the wall came several gates, one of which was the Bab al-Talsim, then known as Bab al-Halba .
The main form of bookbinding used under the Abbasid Caliphate was the binding-cum-case or box manuscript. This technique covered the Qur'an in a casket-like box in order to protect the contents. These boxes were typically made out of wooden boards and had a protective lining on the manuscript-facing side.
The Nahr Isa (Arabic: نهر عيسى, romanized: Nahr ʿĪsā) or Isa Canal was a navigable canal that linked the two great rivers of Mesopotamia, the Euphrates and the Tigris, during the Abbasid Caliphate. It was one of the main water sources and the main avenue of river-borne commerce for the Abbasid capital of Baghdad.
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 ...
The internal politics of the Abbasid caliphate itself seem to have been unstable. In 870, Abū Aḥmad (b. al-Mutawakkil) al-Muwaffaḳ (d. 891) was summoned from exile in Mecca to re-establish Abbasid authority over southern Iraq. Quickly, however, he became the de facto ruler of the caliphate. As a result of this uncertainty, Ahmad ibn Tulun ...
This practiced continued well into the era of the Abbasid Caliphate, as seen under Al-Ma'mun's rule in the 8th century, for example. The taxes (including Zakat and Jizya) collected in the treasury of an Islamic government were used to provide income for the needy, including the poor, elderly, orphans, widows, and the disabled.
The city of Baghdad (Arabic: بغداد Baġdād) was established by the Abbasid dynasty as its capital in the 8th century, marking a new era in Islamic history after their defeat of the Umayyad Caliphate. It replaced Seleucia-Ctesiphon, a Sasanian capital 35 km southeast of Baghdad, which was virtually abandoned by the end of the 8th century.