Small part of a raking cornice assembled from four fragments and restored. It belongs to the archaic Parthenon or Hekatompedon.

It is decorated on one of its sides with an aquatic bird with outspread wings from which only part of the wings survive. They are rendered in relief scales that alternate red and blue colour. Long curved lines are employed to depict the feathers on the lower part of the wings, as well as the red tail feathers. The bird is most likely similar to those depicted on other parts of the cornice such as the fragments Ακρ. 22, Ακρ. 22 α and Ακρ. 22 γ from the decoration of the same archaic building.