A short stay in Dresden in 1821 brought her the acquaintance of Johann Friedrich Kind, Pauline von Brochowska and Theodor Hell.
When her mother died in 1822, Franz moved in with her sister, who was married in Wesel on the Lower Rhine, as she needed support due to her disability.
With her small inheritance and great energy, Franz founded and ran a virgins' association [de] and a working school for poor girls in Wesel.
At the age of 49, Franz died on 13 May 1843 in Breslau, where her memorial stone is also located in the cemetery of the Elftausend-Jungfrauen-Kirche [de].
The grave itself was levelled during road construction work on the occasion of the widening of Elbingstraße in July 1914.