When was "Roundel with Saint John the Baptist and Donors" created?

This artwork was created ca. 1525.

What medium is "Roundel with Saint John the Baptist and Donors"?

Roundel with Saint John the Baptist and Donors is Colorless glass, silver stain, vitreous paint.

Yes, Roundel with Saint John the Baptist and Donors is in the public domain and available for free download under CC0 license.

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Unknown Artist, ca. 1525