The march „Fidele Brüder“, which will be performed for the first time at the 2025 New Year’s Concert of the Vienna Philharmonic, was composed and arranged using well-known motifs from the operetta „Das Veilchenmädel“. The libretto of this operetta was written by Leopold Krenn (1850–1930) and Carl Lindau (real name Karl Gemperle, 1853–1934). At the time, the two had already created a large number of operetta librettos as well as folk plays, many of which were marketed under the label „Schwankfirm...