Seikilos epitaph
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 engraved on a tombstone (a stele) from the Hellenistic town 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 (for example the Hurrian songs), all of it is in fragments; the Seikilos epitaph is unique in that it is a complete, though short, composition.
Music of Wales
The earliest written records of the Welsh harpists' repertoire are contained in the Robert ap Huw manuscript, which documents 30 ancient harp pieces that make up a fragment of the lost repertoire of the medieval Welsh bards. The music was composed between the 14th and 16th centuries, transmitted orally, then written down in a unique tablature and later copied in the early 17th century. This manuscript contains the earliest body of harp music from anywhere in Europe and is one of the key sources of early Welsh music. The manuscript has been the source of a long-running effort to accurately decipher the music it encodes.