German historian of mathematics Moritz Cantor was born #OTD in 1829.
Cantor's inaugural dissertation, "Über ein weniger gebräuchliches Coordinaten-System" (1851), gave no indication that the history of exact sciences would soon be enriched by a master work by him. His first important work was "Über die Einführung unserer gegenwärtigen Ziffern in Europa". His greatest work was Vorlesungen über Geschichte der Mathematik (in 4 vols.).