Séminaire Nicolas Bourbaki

The Séminaire Nicolas Bourbaki (from French: Bourbaki Seminar) is a series of seminars (in fact public lectures with printed notes distributed) that has been held in Paris since 1948. It is one of the major institutions of contemporary mathematics, and a barometer of mathematical achievement, fashion, and reputation.

Source: Wikipedia — Séminaire Nicolas Bourbaki (CC BY-SA 4.0)