The signature of Anthimos Gazis, Greek scholar, priest, revolutionary and politician. He was a leading figure of the Greek Revolt against the Ottoman Empire in 1821. The original source of this image is probably a document from the archives of the Public Library of Milies, Greece.
http://vivl-mileon.mag.sch.gr/hist02_GR.html
Anthimos Gazis (1758-1828) / Άνθιμος Γαζής (1758-1828)