The first International Congress of Philosophy was held in Paris in 1900 on the occasion of the Universal Exhibition. Among the participants were Henri Bergson, Maurice Blondel, Moritz Cantor, Louis Couturat, Henri Poincaré, Giuseppe Peano and Bertrand Russell. The second International Congress took place in Geneva in 1904; the third was held in Heidelberg in 1908 (with Josiah Royce, Wilhelm Windelband and Benedetto Croce). The First World War interrupted the sequence of these events after the 4th International Congress in Bologna in 1911.