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653| 200–700 | Central America [statistics and demography] | The Zapotec site of Monte Albán in Central America is at its peak in this period. It may have had 30,000 or more inhabitants. It is the centre of a complex of public buildings, temples, and dwellings that cover 40 sq km/15 sq mi. | | 598–665 | [maths] | Indian mathematician and astronomer Brahmagupta uses negative numbers in mathematics, and introduces a method of approximation for calculating the sines of small angles. | | 630–668 | India [law and government] | During the reign of Narasimhavarman I, the Pallava dynasty is the dominant power of southern India. After his death, the Pallava kingdom comes under pressure from the Chalukyas and goes into decline, disappearing about 900. | | 653 | Persia, Arab Caliphate [wars] | Yezdegird III, the last king of the Sasanian dynasty of Persia, is murdered at Merv (in modern Turkmenistan), bringing Persian resistance to the Arabs to a complete end. |
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