Seal of the <a href="https://en.wikipedia.org/wiki/sebastos" class="extiw" title="en:sebastos">sebastos</a> Daniel Liberos
Original designs: unknown Byzantine-era artists; Sketches: Gustave Schlumberger (1844–1929)
13th-14th century
Gustave Schlumberger. "Sceaux byzantins inédits (quatrième série)", <i>Revue des Études Grecques</i>, volume 13, fascicule 55, 1900. pp. 467-492