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Events in the 9th Century 6
300 BC – 1279Chola dynasty (South India)A great maritime and temple-building powerThe Cholas of the Tamil south were one of the longest-ruling dynasties in history, rising from the Sangam age to a medieval maritime empire that projected naval power across the Bay of Bengal to Southeast Asia. They built magnificent temples such as the Brihadeeswarar at Thanjavur and patronised bronze sculpture and Tamil literature.
618 – 907Tang Dynasty — China's cosmopolitan golden agePoetry, silk, Buddhism and the world's largest empireThe Tang dynasty is widely considered China's cultural peak. Its capital Chang'an (modern Xi'an) was the world's largest city with over a million inhabitants, cosmopolitan with merchants, monks and diplomats from across Asia. The Tang produced China's greatest poets — Li Bai and Du Fu — and saw Buddhism flourish. Woodblock printing was invented. China's civil service examination system was refined into the model used for 1,300 years.
651 – 1501Islamic Persia — caliphates, Seljuks and MongolsCenturies of Islamic rule and a Persian cultural floweringAfter the conquest, Persia was ruled successively by the Arab caliphates, Persian and Turkic dynasties, the Seljuk Turks, and — devastatingly — the Mongols under Genghis Khan and Hulagu in the 13th century. Yet this era produced a brilliant Persian cultural renaissance: the poetry of Ferdowsi, Rumi, Hafez and Omar Khayyam, and advances in science and mathematics.
742 – 814CharlemagneFather of EuropeKing of the Franks and first Holy Roman Emperor. He united much of Western Europe and sparked the Carolingian Renaissance.
794 – 1185Heian periodThe golden age of classical Japanese cultureWhen Emperor Kanmu moved the capital to Heian-kyo (Kyoto), he began nearly four centuries of peace and refinement remembered as the classical age of Japanese civilisation. The Fujiwara regents dominated the court, and aristocratic culture flowered — producing Murasaki Shikibu's The Tale of Genji, often called the world's first novel.
830Al-Khwarizmi invents algebraKitab al-mukhtasar fi hisab al-jabr — the word algebra is bornAround 830 AD, Muhammad ibn Musa al-Khwarizmi, a scholar at the House of Wisdom in Baghdad, published his treatise on solving equations by balancing and completion. The Arabic title contained the word al-jabr, which became algebra in Latin. Al-Khwarizmi also introduced the Hindu-Arabic numeral system to the Islamic world and described algorithms systematically — the word algorithm derives from the Latin form of his name. His work was the foundation of all subsequent mathematics.