Portrait of the singer Karl Wallenreiter 

Arnold Böcklin's "Portrait of the singer Karl Wallenreiter" is a realistic oil painting depicting the titular singer. The portrait captures Wallenreiter in a contemplative mood, his hand resting on a rolled-up piece of paper. The dark tones of the background emphasize the subject’s features. This work is a testament to Böcklin’s skill as a portrait artist, showcasing his ability to capture the essence of his subject.