Maria Steiner is an Austrian honoured as one of the Righteous Among the Nations.
Hedwig Mendelssohn, chased by the Gestapo, was in danger of being arrested and deported.
Hedwig's husband Dr. Leopold Mendelsohn emigrated to Argentina in 1942, but because Hedwig had only married him in 1941 she wasn't able to get the necessary emigration papers together with him.
Maria Steiner hid Hedwig Mendelsohn despite frequent checks by both the block warden and the Gestapo.
She hid her for three years, until the end of the war, and by doing this she saved Hedwig's life.