Picasso is thought to have made about 50,000 artworks during his lifetime, including paintings, drawings, prints, sculpture, and ceramics. From his extensive production there are many celebrated pieces. Les Demoiselles d’Avignon (1907) was one of the first Cubist works, and, by rejecting illusionism, which art practice had favoured since the Renaissance, it changed the ways in which people considered the role of art and representation. Guernica (1937), Picasso’s response to the German bombing of Guernica, a city in Spain’s Basque region, was met with mixed criticism when it was first exhibited at the world’s fair in 1937, but it grew in popularity as it toured the world in subsequent decades. A few other famous pieces include a portrait of Gertrude Stein (1905–06), Picasso’s friend and patron; The Old Guitarist (1903–04), a piece from his Blue Period (1901–04); and an untitled sculpture, popularly known as “The Picasso” (1967), located in Chicago, a city which Picasso never visited.