Nelly Sachs (10 December 1891 – 12 May 1970) was a Jewish German poet and playwright whose experiences resulting from the rise of the Nazis in World War II Europe transformed her into a poignant spokeswoman for the grief and yearnings of her fellow Jews. Her best-known play is Eli: Ein Mysterienspiel vom Leiden Israels (1950); other works include the poems "Zeichen im Sand" (1962), "Verzauberung" (1970), and the collections of poetry In den Wohnungen des Todes (1947), Flucht und Verwandlung (1959), Fahrt ins Staublose (1961), and Suche nach Lebenden (1971).

Born Leonie Sachs in the Schöneberg district of Berlin, Germany in 1891, to a wealthy manufacturer, she was educated at home because of frail health. She showed early signs of talent as a dancer, but her protective parents did not encourage her to pursue a profession. She grew up as a very sheltered, introverted young woman and never married. She pursued an extensive correspondence with, and was friends with, Selma Lagerlöf and Hilde Domin. As the Nazis took power, she became increasingly terrified, at one point losing the ability to speak, as she would remember in verse: "When the great terror came/I fell dumb." Sachs fled with her aged mother to Sweden in 1940. It was her friendship with Lagerlöf that saved their lives: shortly before her own death Lagerlöf intervened with the Swedish royal family to secure their release from Germany. Sachs and her mother escaped on the last flight from Nazi Germany to Sweden, a week before Sachs was scheduled to report to a concentration camp.