Timeline

9th century

1. c. 820s★★★★★

   Al-Khwarizmi's treatise on algebra

   At Baghdad's House of Wisdom, al-Khwarizmi writes his treatise on completion and balancing, founding algebra as a discipline; the word "algebra" derives from its title.

   Science· Iraq
2. c. 830s★★★★★

   House of Wisdom in Baghdad

   Under Caliph al-Ma'mun the House of Wisdom becomes a centre of translation and scholarship, preserving and extending Greek, Persian and Indian learning.

   ScienceCulture· Iraq