Pablo Picasso was an artist.
Guernica is a mural-sized oil painting on canvas by Spanish artist Pablo Picasso completed in June 1937 , at his home on Rue des Grands Augustins , in Paris . Pablo Picasso ( [ pɪˈkɑːsoʊ , _ - ˈkæsoʊ ] [ ˈpaβlo piˈkaso ] ; 25 October 1881 -- 8 April 1973 ) was a Spanish painter , sculptor , printmaker , ceramicist , stage designer , poet and playwright who spent most of his adult life in France . Regarded as one of the most influential artists of the 20th century , he is known for co-founding the Cubist movement , the invention of constructed sculpture , the co-invention of collage , and for the wide variety of styles that he helped develop and explore . The Blue Period ( Período Azul ) is a term used to define the works produced by Spanish painter Pablo Picasso between 1901 and 1904 when he painted essentially monochromatic paintings in shades of blue and blue-green , only occasionally warmed by other colors .