The sentence "Rose is a rose is a rose is a rose" was written by Gertrude Stein as part of the 1913 poem "Sacred Emily", which appeared in the 1922 book Geography and Plays. In that poem, the first "Rose" is the name of a person. Stein later used variations on the sentence in other writings, and the shortened form "A rose is a rose is a rose" is among her most famous quotations, often interpreted as meaning "things are what they are", a statement of the law of identity, "A is A."

Gertrude Stein was an American novelist, poet, playwright, and art collector. Born in Allegheny, Pennsylvania, and raised in Oakland, California, Stein moved to Paris in 1903, and made France her home for the remainder of her life. She hosted a Paris salon, where the leading figures of modernism in literature and art, such as Pablo Picasso, Ernest Hemingway, F. Scott Fitzgerald, Sinclair Lewis, Ezra Pound, Sherwood Anderson and Henri Matisse, would meet.