Martha Nierenberg, a former biochemist and furniture designer who survived the Holocaust in Hungary and fought for restitution there, has died at 96.

Nierenberg died in her sleep on June 27 at a senior living facility in New York, The New York Times reported at the end of last month.

Nierenberg, who survived the war by hiding in a Roman Catholic hospital, made it to the United States with her mother in 1945. She was born into one of Hungary’s wealthiest families, according to the Times.

Among the family possessions that were plundered by the Nazis and their Hungarian collaborators were some 40 paintings worth millions of dollars. The paintings are still in the possession of the Hungarian state, which has been fighting for the past 30 years against restitution claims filed by Nierenberg. Her family will continue the fight after her passing, they told the Times.