The Seikilos epitaph is the oldest surviving complete musical composition, including musical notation, from anywhere in the world. The epitaph has been variously dated, but seems to be either from the 1st or the 2nd century AD. The song, the melody of which is recorded, alongside its lyrics, in the ancient Greek musical notation, was found in 1883 engraved on a pillar from the Hellenistic town of Tralles near present-day Aydın, Turkey, not far from Ephesus. It is a Hellenistic Ionic song in either the Phrygian octave species or Iastian tonos. While older music with notation exists, all of it is in fragments; the Seikilos epitaph is unique in that it is a complete, though short, composition.
The marble Seikilos stele with poetry and musical notation at the National Museum of Denmark
The stele along with other exhibits at the National Museum of Denmark
The inscription, minus the last line, in detail
Musical notation is any system used to visually represent auditorily perceived music, played with instruments or sung by the human voice through the use of symbols, including notation for durations of absence of sound such as rests. For this reason, the act of deciphering or reading a piece using musical notation, is known as "reading music".
A photograph of the original stone at Delphi containing the second of the two Delphic Hymns to Apollo. The music notation is the line of occasional symbols above the main, uninterrupted line of Greek lettering.
Music notation from an early 14th-century English Missal
Early music notation
Jeongganbo musical notation system