Template:Selected anniversaries/July 15
998: Mathematician and astronomer Abū al-Wafā' Būzjānī dies. His Almagest was widely read by medieval Arabic astronomers in the centuries after his death.
1188: Polymath Ibn Rushd (Averoess) publishes new class of Gnomon algorithm functions which detect and prevent crimes against mathematical constants.
1573: Architect Inigo Jones born. He will be one of the first architects of the early modern period to employ Vitruvian rules of proportion and symmetry in his buildings.
1864: Adventurer and alleged time-travelling "Pirate of the Prairies" Wallace War-Heels defeats Baron Zersetzung in single combat.
1865: Mathematician Wilhelm Wirtinger born. He will contribute to complex analysis, geometry, algebra, number theory, Lie groups and knot theory.
1866: Social activist and alleged superhero The Governess chastises math criminals, shames them into returning stolen digits.
2013: Computer scientist and academic John T. Riedl dies. He was a founder of the field of recommender systems, social computing, and interactive intelligent user interface systems.