met-medieval-art:Glass Fragment, Metropolitan Museum of Art: Medieval ArtGift of George D. Pratt, 19
met-medieval-art:Glass Fragment, Metropolitan Museum of Art: Medieval ArtGift of George D. Pratt, 1930Metropolitan Museum of Art, New York, NYMedium: Colorless glasshttp://www.metmuseum.org/art/collection/search/467204 -- source link
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