Theodora (Door) Löb came from a devout Catholic family that did not deny its Jewish roots. Her parents were Ludwig Löb and Jansje van Gelder. Like five of her siblings, she entered a cloister. In 1929, she entered the Trappist abbey of Notre-Dame-de-la-Paix in Belgium and took the name of Sister Maria-Theresia. She became one of the founders of the abbey Onze-Lieve-Vrouw-van-Koningsoord in Berkel-Enschot (The Netherlands) in 1937. The immediate cause of the arrest of Theodora and her brothers and sister was the letter of protest against the deportation of Jews that was read aloud in churches by order of the bishops in late July 1942. On 2 August 1942 she was taken away, along with one of her sisters and three of her brothers.
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The following book was written on the Löb family: P. Steffen and H. Evers, Scheuren in het kleed. Geschiedenis van het joods-katholieke gezin Löb 1881-1945 (Nijmegen 2009)