The story
Founded by Luigi Bianchi and Salvatore Pincherle in 1922.1
Salvatore Pincherle, professor at the University of Bologna, sent on 31 March 1922 a letter to all Italian mathematicians in which he planned the establishment of a national mathematical society. The creation was inspired by similar initiatives in other countries, such as the Société mathématique de France (1872), the Deutsche Mathematiker-Vereinigung (1891), the American Mathematical Society (1891) and, above all, the International Mathematical Union (1920).
The most important Italian mathematicians of the time - among all Luigi Bianchi and Vito Volterra - encouraged Pincherle's initiative also by personally sending articles for the future Bulletin; overall, about 180 mathematicians replied to Pincherle's letter. On December 7 of the same year the first meeting was held.
In 1928 the Italian Mathematical Union hosted the International Congress of Mathematicians in Bologna.
From Wikipedia’s article on Italian Mathematical Union, shared under CC BY-SA 4.0.4