Ismāʿīl bin ʿAlī bin Maḥmūd bin Muḥammad bin ʿUmar bin Shāhanshāh bin Ayyūb bin Shādī bin Marwān[1] (Arabic: إسماعيل بن علي بن محمود بن محمد بن عمر بن شاهنشاه بن أيوب بن شادي بن مروان), better known as Abū al-Fidāʾ or Abulfeda (Arabic: أبو الفداء; November 1273 – 27 October 1331),[2] was a Mamluk-era Kurdish geographer, historian, Ayyubid prince and local governor of Hama.[3]
In his boyhood he devoted himself to the study of the Qur'an and the sciences, but from his twelfth year onward, he was almost constantly engaged in military expeditions, chiefly against the Crusaders.[6]
In 1285 he was present at the attack on a stronghold of the Knights of St. John, and took part in the sieges of Tripoli, Acre and Qal'at ar-Rum. In 1298 he entered the service of the MamluksultanMalik al-Nasir and after twelve years was invested by him with the governorship of Hama. In 1312 he became prince with the title Malik us-Salhn, and in 1320 received the hereditary rank of sultan with the title Malik ul-Mu'ayyad.[6]
Taqwim al-Buldan ("A Sketch of the Countries") is, like much of the history, founded on the works of his predecessors, including the works of Ptolemy and Muhammad al-Idrisi. A long introduction on various geographical matters is followed by twenty-eight sections dealing in tabular form with the chief towns of the world. After each name are given the longitude, latitude, climate, spelling, and then observations generally taken from earlier authors. Parts of the work were published and translated as early as 1650 in Europe.[6] In his works Abu'l-Fida correctly mentions the latitude and longitude of the city of Quanzhou in China.[7]
The book also contains the first known explanation of the circumnavigator's paradox. Abu'l-Fida wrote that a person who completed a westward circumnavigation of the world would count one fewer day than a stationary observer, since he was traveling in the same direction as the apparent motion of the sun in the sky. A person traveling eastward would count one more day than a stationary observer.[8] This phenomenon was confirmed two centuries later, when the Magellan–Elcano expedition (1519–1522) completed the first circumnavigation. After sailing westward around the world from Spain, the expedition called at Cape Verde for supplies on Wednesday, 9 July 1522 (ship's time). However, the locals told them that it was actually Thursday, 10 July 1522.[9]
History
His Concise History of Humanity (Arabic: المختصر في أخبار البشرTarikh al-Mukhtasar fi Akhbar al-Bashar, also An Abridgment of the History at the Human Race, or History of Abu al-Fidaتاريخ أبى الفداء) was written between 1315 and 1329 as a continuation of The Complete History by Ali ibn al-Athir (c. 1231). It is in the form of annals extending from the creation of the world to the year 1329.[10]
^Gunn, Geoffrey C. (15 October 2018). Overcoming Ptolemy: The Revelation of an Asian World Region. Lanham, Maryland: Lexington Books. pp. 47–48. ISBN9781498590143.
^Winfree, Arthur T. (2001). The Geometry of Biological Time (2nd ed.). New York: Springer Science & Business Media. p. 10. ISBN978-1-4757-3484-3.
^Helaine Selin, Encyclopaedia of the History of Science, Technology, and Medicine in Non-Westen Cultures (1997), p. 7.
^Henricus Orthobius Fleischer, Abulfedae historia anteislamica, arabice: E duobus codicibus bibliothecae regiae Parisiensis, 101 et 615, F.C.W. Vogel (1831).
General and cited references
Gibb, H. A. R. (1986). "Abu'l Fidā". The Encyclopaedia of Islam. Vol. 1: A–B. Leiden, The Netherlands: Brill. pp. 118–119.
Studies on Abul-Fida' al-Ḥamawi (1273–1331 A.D.) by Farid Ibn Faghül, Carl Ehrig-Eggert, E. Neubauer. Institute for the History of Arabic-Islamic Science (Institut für Geschichte der Arabisch-Islamischen Wissenschaften) at the Johann Wolfgang Goethe University, Frankfurt am Main, Germany, 1992.
Encyclopedie de l'Islam(in French), 2nd ed. E.J. Brill, Leiden and G.P. Maisonneuve, Paris, 1960.