Marianne Koszorek is the matriarch of the Liberacki family.

Except for the information on her sone Mikolaj's birth certificatge, we know little about Marianne Koszorek. She was born in 1850 and in 1875 was living in Siestrzanki, Burzyn, Poland.

Polish painter Józef Chelmonski was a contemporary of Maria. Other contemporaneous Polish artists include Jan Matejko, Stanislaw Wyspianski, and Jacek Malczewski.