Die Liebe der Danae (The Love of Danae) is an opera in three acts by Richard Strauss to a February 1937 German libretto by Joseph Gregor, based on an outline written in 1920, "Danae, or The Marriage of Convenience", by Hugo von Hofmannsthal. Strauss worked on the score in 1937, 1938 and into 1939, although he was pre-occupied with completing Daphne, developing ideas with Gregor and finally replacing him as librettist for Capriccio, and then succumbed to illness, which caused postponement for several months into 1940. The opera was finally finished on 28 June 1940.