She established an organization to assist young women seeking work in Berlin and help protect them from becoming prostitutes, and founded a recreation home for women where they could also be trained in housework and gardening. She was in favor of combating prostitution through strong laws penalizing the clients of prostitutes. Her mother died in , and Hanna had to assume the maternal role.
Her early work includes portraits of her family and views of the family house in Glaubitten. She traveled to study art in Italy, Tunisia, Greece and Constantinople. Her ink drawings, watercolors and paintings of everyday scenes and people from this period have been preserved. She was represented with three oil paintings at the exhibitions of the Konigsberg Art Association in and She was also part of the German delegation to the Women's Congress at the Exposition.
In , when she was thirty-seven, Hanna married the lawyer Richard Bieber born , whom she had met while studying in Berlin. He was seven years her junior. Bieber was Jewish in origin, but had become Christian. He wanted to marry in St.
Mary's Church, but Protestant pastors refused a church wedding. The couple had a civil marriage and remained childless. The feminists often handed petitions to the German Reichstag for changes in women's status and equal rights to men.
This gave support to girls looking for accommodation and help in finding work. The main goal was to protect young women with no family in Berlin from prostitution. The homes were connected with housekeeping schools to prepare the residents for later life. This was an umbrella organization campaigning for improvements to family law, protection of female workers, protection of children and other causes.
