 (1859–1935) opened the first of the Thannhauser Galleries in Munich in the fall of 1909, after deciding to leave the gallery that he had previously opened with his friend Franz Josef Brakl.He called his new business the "Modern Gallery" ("Moderne Galerie") and established it in the glass-domed Arcopalais at Theatinerstraße 7, in the heart of Munich's shopping district.The gallery was, by most accounts, one of the largest and most beautiful art galleries in the city.