German graphic artist, active in Austria. He came from a poor family, and was able to study at the Academy of Fine Art in Vienna through support from Count Franz Josef Thun and owing to his Masonic connections. He is mainly known for his series of views of Vienna, "Collection de 50 vues de la ville de Vienne" (1779), which he created with Carl Schütz and Laurenz Janscha for the Artaria publishing house. He committed suicide in Vienna. //