met-medieval-art:Ostrakon with Lists of the Days of the Week via Medieval ArtMedium: Limestone with
met-medieval-art:Ostrakon with Lists of the Days of the Week via Medieval ArtMedium: Limestone with ink inscriptionRogers Fund, 1914Metropolitan Museum of Art, New York, NYhttp://www.metmuseum.org/art/collection/search/474904 -- source link