There was also Picasso. In fact, the most famous and popular piece of artwork at the Reina Sofia is Picasso's Guernica (no photos allowed). One of the most powerful and moving anti-war pieces of art, Guernica depicts a specific event from Spanish Civil War: the world’s first saturation-bombing raid on civilians, which was carried out on the town of Guernica by Adolf Hitler at Franco's request. In fact, the massive painting was made contemporaneously and was touring in support of the Republican cause at the time of Franco's victory.