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This dragon by Albrecht Dürer was photographed in 1925 when it came up at auction. Where is it now? Source.
Source.
Source. This work appears in the Met's exhibition of Maximilian I's jousting armour, which you can see in this video.
Portrait of a walrus seen by Dürer in the Netherlands in 1521. Source.
This is the woodblock used to print The Entombment of Christ, part of the Small Passion series. It's in the British Museum along with 34 of the 36 others in the set. Source.