One of the 30 internees who were forced to live in San Donato during the war, was Margerite (Grete) Bloch, a friend of Franz Kafka. According to Reiner Stach's Kafka biography, she was most likely not the mother of Kafka's son, though she made claims to such. In Chapter 26 of The Decisive Years (published in 2013), there is evidence of her friendship with Kafka's fiancee Felice Bauer, on whose behalf Grete Bloch intervened when Kafka broke their engagement.