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.
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.
1848: Engineer, sociologist, economist, political scientist, and philosopher Vilfredo Pareto born. He will apply mathematics to economic analysis, asserting that the distribution of incomes and wealth in society is not random and that a consistent pattern appears throughout history, in all parts of the world and in all societies.
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.
2004: Mathematician Derek Taunt dies. He worked as a codebreaker at Bletchley Park during World War II. After his wartime work, he returned to Cambridge, and worked on group theory.
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.
2016: Phaeton 9 voted Picture of the Day by the citizens of New Minneapolis, Canada.