Pere Ysern i Alié is a Catalan painter. He was born during the full effervescence of Catalonia, economic, cultural, political. He lived most of his life in Paris, where he discovered Impressionism. His painting owes a lot to the French Impressionists, he knew how to assimilate the spirit of art of that time. Then on April 3, 1899, with his comrades from the Borrell Academy, Pidelaserra and Fontbona, he left for Paris, at the time when it was a moment of great splendor magnified by the celebration of its universal exhibition, with the Eiffel Tower which is the symbol of European change. He arrives in Paris with different aesthetic opinions and the appearance of another way of thinking specific to the old continent. In the field of art, this will result in a reaction against the idealism of the liberal empire, which is done around Gustave Courbet, as well as the Barbizon school with Corot, Pissarro and Louis Dauvigny ... This foundation of the landscape school will have profound repercussions on Catalan society, on artistic change. It is a France full of vitality and enriched by the industrial revolution that Pere Ysern i Alié found when he arrived there. He will discover the wall decorations of the Pantheon of Puvis de Chavannes, but also the impressionists at the Musée du Luxembourg, it is in this museum that he will be confronted for the first time with the impressionist phenomenon; he learned there that the forms are what one believes to see: an appearance, and that it is necessary to give up the drawing of the contour by replacing it by fragmented keys; he studied the great impressionists, such as Monet, Bazille, Sisley and Pissarro. He is immersed in Parisian life and frequents the Catalan circle who resided in Paris and rubbed shoulders with famous Parisian cabarets like the Moulin Rouge, owned by the Catalan Josep Oller, he rubbed shoulders with Toulouse-Lautrec there. He will return shortly to Barcelona] in 1904, but his painting is not appreciated as he thinks he deserves, this will therefore confirm his residence in Paris, where he becomes accustomed to the Salon des Indépendants. However, the First World War will precipitate a change of the city of Paris, we close the Moulin Rouge for example, Montmartre loses its animation (the fire of 1915 of the Moulin Rouge will touch Pere Ysern i Alié, which remains all the same faithful in Montmartre). Montparnasse will become the new district where we must be. But Father Ysern i Alié will continue to paint, under the cover of new aesthetic movements and remains as faithful to cafes, cabarets as ever. Once the war is over, an optimistic renewal will reach Paris with the Roaring Twenties (the 1920s) which will be marked by the North American presence, fox-trot and jazz.