From the beginning of the Islamic history, the scholars developed the Islamic hijri calendar as a lunar calendar designed to organize timekeeping for religious and social needs. The development of the Islamic calendar and the different tasks related to it played a leading role in the advance of Arabic astronomy as an applied and theoretical science. The following article presents a survey on the Islamic hijri calendar and the varieties of timekeeping devices related to it. A special concern is devoted to the Ottoman contributions in this field.
Glances on Calendars and Almanacs in the Islamic Civilization
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Figure 1: Professor Salim Al-Hassani, Professor Mohammed Abattouy and other award recpients at the Awards Event
Similar manuscripts of work on anatomy contained illustrated chapters on five systems of the body: bones, nerves, muscles, veins and arteries. This page depicts the arteries, with the internal organs shown in watercolors.
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