Lav Mirski (born Leo Fritz; 21 June 1893 – 29 April 1968) was Croatian Jewish conductor. Mirski was born in Zagreb to a Jewish family. He completed his cello studies at the conservatory of University of Zagreb. In 1913, Mirski moved to Vienna, where he worked until 1917 when he returned to Croatia, Osijek. Mirski participated in the founding of the "Society for the advancement of science and arts" in Osijek, which in 1921 became the "City music school", and "Municipal conservatory". Since coming to Osijek, Mirski advocated the establishment of a permanent philharmonic, which he succeeded in 1924. With Mirski at head, Osijek philharmonic performed the most complex pieces of domestic and foreign composers. In 1923 Mirski became the director of the opera at the Croatian National Theatre in Os