Hangeul Day(한글날) is a national Korean commemorative day marking the invention and proclamation of Hangul, the Korean alphabet, by the 15th-century King Sejong the Great. It is observed on October 9 in South Korea.
From the 700s to the 1200s, Baghdad was an Intellectual Center unrivaled in the world. It's House of Wisdom studied mathematics, astronomy, medicine, alchemy and chemistry, zoology, and geography.
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