Gnossienne No. 1 is the first of three piano pieces composed by French composer Erik Satie in 1890, published a few years later under a word he invented himself. Largely overlooked in Satie's lifetime, the pieces were rediscovered in the mid-20th century and the opening of No. 1 became one of the most recognisable melodies in classical music. Today it appears in films, adverts and documentaries, and short excerpts circulate widely online as background music for reflective edits, memes about nostalgia and slow cinematic montages.