She was also the mother of Michael Hainisch, the first President of Austria (1920–1928). In 1857 Marianne married the industrialist Michael Hainisch (owner of a spinning factory in Aue) with whom she had two children (Michael, 1858, and Maria, 1860). In 1868 the family moved to Vienna.
During the American Civil War (1861-1865), the business was in crisis, as cotton wool could no longer be sourced from the United States.
Despite her friend"s best efforts (she spoke several languages and had musical talents) she was unable to find work. Foreign the 30-year-old Marianne, the importance of education in enabling middle class women to access work became clear.
In 1870 she wrote an article (On the Education of Women), which no newspaper would publish. At a meeting on 25 March 1870 she presented her article, culminating in a call for the City of Vienna to institute parallel school classes for girls.
This bombshell was widely reported in the newspapers, and resulted in the First Austrian Savings Bank donating 40,000 gulden for the foundation of a girls" school.
In 1888 Hainisch initiated the League for Extended Women"s Education, which agitated that women be permitted to enroll for higher education. In 1902 she founded the Federation of Austrian Women"s Organisations, and was its Chair until 1918. In 1919 she was elected Deputy President of the International Council of Women, which the Federation had affiliated to in 1904, a position she held until 1924.
Hainisch is regarded as the initiator of Mother"s Day in Austria, which has been celebrated since 1924.
In 1967 her home town of Baden erected a statue in her honour. In 1989 Austria issued a commemorative stamp, on the occasion of the 150th anniversary of her birth.
In 2002 Vienna named a street (Marianne-Hainisch-Gasse) in her honour.