The lasting fame of conductor Karl Böhm is based on qualities that were praised by listeners, musicians and critics throughout his long career: his discipline and meticulousness when rehearsing compositions as well as his modesty, his willingness to take second place to work and composer. After many years serving as principal conductor in several opera houses he left his administrative duties behind and embarked on an international career as an acclaimed guest, concert and opera conductor. He was regularly invited by the New York Met and the Deutsche Oper Berlin, to the festivals in Salzburg (as of 1938) and Bayreuth (as of 1962), he gave guest performances from Tokyo to Moscow, from Milan to Buenos Aires, and at the broadcasting corporations in Berlin, Munich, Cologne, Frankfurt and Stuttgart. The Radio-Sinfonieorchester Stuttgart (known under a few different names during its long history until 2016 when it merged with its sister orchestra from Baden-Baden and Freiburg to form the new SWR Symphonieorchester) not only played all over Germany but toured extensively through entire Europe. It had a catologue of several hundreds of recordings and performed with some of the finest soloists of the 20th century. Among them was Branka Musulin, an extraordinary pianist who worked with some of the most famous conductors of her time, among them Willem Mengelberg, Hermann Abendroth, Franz Konwitschny, Georg Solti and Sergiu Celibidache.