Flag of Andronikos Palaiologos — Device of the Byzantine emperor Andronikos II Palaiologos, in the so-called "Flag of Andronikos Palaiologos" kept in the Vatopedi Monastery. By Original design ca. 1330 AD; sketch by Bernhard von Koehne - Bernhard v. Koehne, "Vom Doppeladler", pp. 1–26, in Berliner Blätter für Münz-, Siegel- und Wappenkunde, Vol. 6, 1871–1873, Tafel LXVII.6,
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=65013938