#OTD in 1897.
The first International Congress of Mathematicians is held in Zürich, Switzerland.
The organizers included such prominent mathematicians as Luigi Cremona, Felix Klein, Gösta Mittag-Leffler, Andrey Markov, and others. The congress was attended by 208 mathematicians. Only four were women: Iginia Massarini, Vera Schiff, Charlotte Scott, and Charlotte Wedell.
Full text is available at @internetarchive
https://archive.org/details/mathematicalpap00socigoog