Art Art History of the 20th Century Authenticity Colour Conservation Fake Fine Arts Fragility Francis Picabia History of Science Ironie Materialisation Meret Oppenheim Museology Museum Nostalgia Painting Painting Technique Patina Paul Klee Rating Science Valorisation Value Category Werte; Fragilität; Malerei; Konservierung; Restaurierung; Museum; Wertekategorie; Bewertung; Francis Picabia; Fälschung; Maltechnik; Materialisierung; Paul Klee; Meret Oppenheim; Klodin Erb; Farbe; Fluss; Ironie; Authentizität; Patina; Nostalgie; Valorisierung; Kunst; Wissenschaft; Kunstgeschichte des 20. Jahrhunderts; Museumswissenschaft; Wissenschaftsgeschichte; Kunstwissenschaft; Values; Fragility; Painting; Conservation; Value Category; Rating; Fake; Painting Technique; Materialisation; Colour; Authenticity; Nostalgia; Valorisation; Art; Science; Art History of the 20th Century; Museology; History of Science; Fine Arts