Flora and Siegfried Wilmersdörfer lived with their daughter Anna in Landshut before Siegfried Wilmersdörfer became a partner in his uncle's business ‘Max Wilmersdörfer Manufactory Wholesaler’ in Munich in 1921. From 1927, the family lived at Haimhauserstraße 19 (today Haimhauserstraße 1). In 1938, the knitwear manufacturer Max Ringelmann ‘aryanised’ the family's business.
Their daughter Anna was able to emigrate to New York in 1937. Flora and Siegfried Wilmersdörfer planned to emigrate to their daughter in the USA and embarked on the ‘St. Louis’ to Cuba in 1939. However, the ship was not allowed to dock in Havana. After a long odyssey, the Wilmersdörfer couple were finally accepted in Belgium. Siegfried Wilmersdörfer died in Brussels in 1941, while his wife Flora Wilmersdörfer was deported from Mechelen to Auschwitz in July 1943 and murdered there.
On 27 January 2022, a memorial service was held for the Wilmersdörfer couple in the parish hall of the Evangelical Lutheran Church of the Redeemer in Schwabing. Afterwards, the Memorial Signs for Siegfried and Flora Wilmersdörfer were placed at their former home at Haimhauserstraße 1.