The Belgian Mathematical Society (abbreviated as BMS), founded in 1921 by Théophile de Donder at the Université libre de Bruxelles, is the national mathematical society of Belgium and a member society of the European Mathematical Society. Its mission is to assemble all Belgian mathematicians and defend their interests. Foreign members are also welcome. The society publishes the journal Bulletin of the Belgian Mathematical Society - Simon Stevin and distributes a newsletter to members, both at a rate of five issues per year. ()