The opera "Maria", by Roman Statkowski, was performed in various Polish cities between 1919 and 1965.
Statkowski's two operas were Philaenis (or Filenis) (1897, first performed in 1904) and Maria (1903-4, first performed in 1906). The latter is based on a novel of the same name by Antoni Malczewski. It has achieved some popularity in its native country and has been performed in various Polish cities between 1919 and 1965. 
