Assassin (disambiguation) - Wikipedia
The Assassins, were an order of Nizari Ismailis, particularly those of Persia and Syria that formed around 1091. Posing a strong military threat to Sunni Seljuq authority within the Persian territories, the Nizari Ismailis captured and inhabited many mountain fortresses under the leadership of Hassan-i Sabbah. The modern word "assassin" is derived from their name.
The Muslim astronomers corrected the many mistakes Ptolemy had made. They improved the study of astronomy with the help of the astrolabe that could determine many pieces of information such as latitude, time, position and movement. Many of these Islamic ideas were also found in Western Europe. Bryan
Abū ʿAbdallāh Muḥammad ibn Mūsā al-Khwārizmī (Arabic: عَبْدَالله مُحَمَّد بِن مُوسَى اَلْخْوَارِزْمِي), earlier transliterated as Algoritmi or Algaurizin, (c. 780 – c. 850) was a Persian mathematician, astronomer and geographer during the Abbasid Empire, a scholar in the House of Wisdom in Baghdad.
In the Muslim Empire there were Houses of Wisdom that scholars could go to to exchange ideas with other scholars and learn.They would translate Greek and Roman classics into Arabic, which helped to preserved these stories which could have been lost. In the House of Wisdom, there was a huge library which was open to public use. There were Islamic sacred texts along with books on law, history, and other topics. This library set an example for larger libraries later to come. ~MA KUKOSKi
Kitab al-Bulhan or Book of Wonders (late 14thC.)
The Kitab al-Bulhan, or Book of Wonders, is an Arabic manuscript dating mainly from the late 14th century A.D. and probably bound together in Baghdad during the reign of Jalayirid Sultan Ahmad (1382-1410).The manuscript is made up of astrological, astronomical and geomantic texts compiled by Abd al-Hasan Al-Isfahani, as well as a dedicated section of full-page illustrations, with each plate titled with “A discourse on..”, (a folktale, a sign of the zodiac)
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