grünfeld also composed an operetta, "der lebemann", with a libretto by ludwig fischl and alexander landesberg, which premiered in 1903 in vienna, and a comic opera "die schönen von fogaras," with libretto by victor léon, which was performed in dresden in 1907. neither of these works were hugely successful, but some songs and excerpts went on to be well-known, including "an mein wien" and the "diner waltz" from "der lebemann" and the "ballett-intermezzo" and "entr'acte" from "die schönen von fogaras".