Private Foundations
Famous German painters 
Dürer is best known as a great graphic artist, but he also explored the theoretical
foundations of his art in his three published books on geometry, fortification and human proportions
...hesitation between music, literature and painting, Paul Klee decided in favor of painting in 1899 and first studied graphics at a
private school in Munich with Heinrich Knirr (1862-1944)
...
Nebenberuflich selbstständig 
Nebenberuflich selbständig ist, wer sich neben seinem Hauptjob im Anstellungsverhältnis eine selbständige Nebentigkeit begründet.