1000s (decade)

The 1000s (pronounced "one-thousands") was a decade of the Julian Calendar which began on January 1, 1000, and ended on December 31, 1009.

Science and technology

 * The scientific achievements of the Islamic civilization reach their zenith. Major works from this decade include Ibn al-Haytham (Alhacen)'s Book of Optics, Abu al-Qasim al-Zahrawi (Abulcasis)'s 30-volume medical encyclopedia, the Al-Tasrif.
 * Other significant contributions to scientific and mathematical understanding were made by Avicenna, who would later publish influential works on medicine, Persian Muslim polymath and scientist Abu Rayhan al-Biruni, Arab Egyptian Muslim mathematician and astronomer Ibn Yunus, Persian Muslim physicist and mathematician Abu Sahl al-Quhi (Kuhi) and Persian Muslim astronomer and mathematician, Abu-Mahmud al-Khujandi.
 * The Law of sines is discovered by Muslim mathematicians.
 * Bell foundry is founded in Italy.
 * Gunpowder is invented in China.

Significant people

 * Abd al-Rahman Ibn Yunus
 * Al-Qadir caliph of Baghdad
 * Abu al-Qasim al-Zahrawi (Abulcasis)
 * Abu-Mahmud al-Khujandi
 * Abu Nasr Mansur
 * Abu Rayhan al-Biruni
 * Alhacen (Ibn al-Haytham)
 * Avicenna (Ibn Sina)
 * Basil II
 * Boleslaus I of Poland
 * Brian Boru
 * Bruno of Querfurt
 * Robert II of France
 * Robert Guiscard
 * Roger I of Sicily
 * Sancho III of Navarre
 * Stephen I of Hungary
 * Sweyn I of Denmark
 * Tsar Samuil of Bulgaria