Das Dreimäderlhaus (House of the Three Girls), adapted into English-language versions as Blossom Time and Lilac Time, is a Viennese pastiche operetta with music by Franz Schubert, rearranged by Heinrich Berté (1857–1924), and a libretto by Alfred Maria Willner and . The work gives a fictionalized account of Schubert's romantic life, and the story was adapted from the 1912 novel Schwammerl by Rudolf Hans Bartsch (1873–1952). Originally the score was mostly Berté, with just one piece of Schubert's ("Ungeduld" from Die schöne Müllerin), but the producers required Berté to discard his score and create a pasticcio of Schubert music.