"Irma's injection" is the name given to the dream that Sigmund Freud dreamt on the night of July 23, 1895, and that he subsequently analyzed to arrive at his theory that dreams are wish fulfillments.
Sigmund Freud-Stele on Cobenzl in Vienna. Text: "Do you suppose that some day a marble tablet will be placed on the house, inscribed with these words: "In this house on July 24th, 1895, the secret of dreams was revealed to Dr. Sigm. Freud." At this moment I see little prospect on it." (Sigmund Freud an Wilhelm Fließ. Belle Vue. 12. Juni 1900). Sigmund Freud-Gesellschaft 6. Mai 1977