What country does the painter Arnold Böcklin come from?

Arnold Böcklin (1827-1901) was a Swiss symbolist painter. Böcklin exercised an influence on Giorgio de Chirico and on Surrealist painters like Max Ernst and Salvador Dalí. When asked who was his favorite painter, Marcel Duchamp controversially named Arnold Böcklin as having a major influence on his art. Whether Duchamp was serious in this assertion is still debated.