Watch Online Free on Watchseries. A passionate conductor and composer, Gustav Mahler never received the recognition he deserved during his lifetime but has since come to be known as a prominent post-Romantic master of song and symphony. Filmed in Vienna, Austria; Budapest, Hungary; Hamburg, Germany; and the Czech Republic, this documentary explores the Bohemia-born Mahler's life and inspirations, from his turbulent childhood years to his ambitious adult career.