Hugo Reinhold Karl Johann Höppener was a German artist from Lübeck known for his Art Nouveau (Jugendstil) and symbolist work. He often included nude figures: he was a member of Karl Willhelm Diefenbach’s communue in Munich, where nudity, harmony with nature and vegetarianism were practiced. His best-known art related to mysticism and nature; his illustrations became influential again over 100 years later in the 1960s.
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He became known as Fidus, meaning loyal, or faithful, because he offered to serve a prison sentence for public nudity on behalf of the commune.
