The Séminaire Nicolas Bourbaki (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. It is named after Nicolas Bourbaki, a group of French and other mathematicians of variable membership.
The Poincaré Seminars are a series of talks on physics inspired by the Bourbaki seminars on mathematics.
For later years see
The proceedings of the Séminaire have been published by four different publishers over the years. 1948/49 through 1964/65 were published as Textes des conférences / Séminaire Bourbaki by the Secrétariat Mathématique, Université Paris. In 1966, W. A. Benjamin, Inc. issued a special twelve-volume facsimile reproduction of the Séminaire Bourbaki, 1948-1965. W. A. Benjamin, Inc. continued to publish the proceedings for three more years, 1965/66 through 1967/68. Springer-Verlag published 1968/69 through 1980/81 as part of its Lecture Notes in Mathematics series. 1981/82 to date are published by the Société Mathématique de France as part of Astérisque.