Nina Sontag, an opera singer turned Cistercian nun

Nina Sontag (1811–1879) had a successful stage career in northern Germany before entering the Cistercian Abbey of Marienthal in 1846. She had first tried the Discalced Carmelites, but did not have the stamina for their severe penances. That may have been providential, since she had more opportunities to sing as Sister Juliane, her name as a Cistercian nun. 

This advertisement shows that she performed in Drury Lane Theater together with her sister Henriette in June, 1829. Nina was then only 17. Her career had begun even earlier: when she was 14 she had der debut as an opera singer in Berlin.

This photo shows a scene from Frank Rebitschek's modern play, Schwestern, which describes the relationship between Nina and her