was a Catalan artist. Living through a turbulent time in the history of his native Barcelona, he was known as a portraitist, sketching and painting the intellectual, economic, and political elite of Barcelona, Paris, Madrid, and beyond; he was also known for his paintings of crowd scenes ranging from the audience at a bullfight to the assembly for an execution to rioters in the Barcelona streets. Also a graphic designer, his posters and postcards helped to define the Catalan art movement known as modernisme. Casas was born in Barcelona. His father had made a fortune in Matanzas, Cuba; his mother was from a well-off Catalan family. In 1877 he abandoned the regular course of schooling to study art in the studio of Joan Vicens. In 1881, still in his teens, he was a co-founder of the magazine L'Avenç; the 9 October 1881 issue included his sketch of the cloister of Sant Benet in Bages. That same month, accompanied by his cousin Miquel Carb i Carb, a medical student, he began his first stay in Paris, where he studied that winter at the Carolus Duran Academy and later at the Gervex Academy, and functioned as a Paris correspondent for L'Avenç. The next year he had a piece exhibited in Barcelona at the Sala Paris, and in 1883 in Paris the Salon des Champs Elysies exhibited his portrait of himself dressed as a flamenco dancer; the piece won him an invitation as a member of the salon of the Societe d'artistes françaises. The next few years he continued to paint and travel, spending most autumns and winters in Paris and the rest of the year in Spain, mostly in Barcelona but also in Madrid and Granada; his 1886 painting of the crowd at the Madrid bullfighting ring was to be the first of many highly detailed paintings of crowds. That year he survived tuberculosis, and convalesced for the winter in Barcelona.