The bohemian art glass studio Loetz-Witwe Klostermuehle was one the most important manufacturer in the 20th century. Following the example of J & L Lobmeyr and Louis Comfort Tiffany, the studio Loetz produced iridescent art glass in an unmatched quality and worked with the most famous artists of their time. Blueprints for production came from Josef Hoffmann, Franz Hofstötter, Adolf Beckert, Koloman Moser, Dagobert Peche, Michael Powolny, Marie Kirschner and many more.