Ancient Egyptian music notation
From a set of 6 parchments described by German musicologist Hans Hickmann in his 1956 book Musicologie Pharaonique, or Music under the Pharaohs, as dating from the 5th to 7th centuries C.E. Colors are presumed to indicate pitch and size to indicate duration. Writings on the parchment are in Coptic with indications like “Spiritual Harmony” and “Holy Hymn Singer”. This manuscript had a profound influence on Egyptian composer Halim El-Dabh’s music notation and paintings when he discovered a reproduction in Vogue magazine in 1952.
Note: I wasn’t able to locate these manuscripts and couldn’t find any reference to them online, but they are presumably in NY’s Metropolitan Museum collections. This image comes from Theresa Sauer’s book Notations 21, Mark Batty Publisher, USA, 2009.