Karl Wilhelm Diefenbach, born in Hadamar in 1851 and died in Capri in 1913, was a German painter and social reformer, pioneer of nudism and pacifist movement.
The community founded by him in Vienna, active between 1897 and 1899, was one of the models for the colony on Monte Verità in Ascona.
Diefenbach supported ideals of social reform, professing a life-style in harmony with nature, refusal of monogamy and religion, and the practice of a vegetarian diet.
When his community bankrupt, he moved to the island of Capri where he spent the rest of his life.
Diefenbach found on the island the right inspiration for his paintings, exhibiting in the atelier of via Camerelle, near the Piazzetta of Capri.
Capri (writes Diefenbach) with these rough cliffs I adore, and this tremendous and beautiful sea will suffice me for the rest of my life, even though I suffer the boycott of my fellow countrymen, who move against me with shameful accusations of immorality and impiety.