Is “Doorknob” in the public domain?

Yes. “Doorknob” is public domain and released under CC0, so it is free to download and reuse for any purpose, including commercially, with no permission needed.

Can I use “Doorknob” commercially for free?

Yes. As a CC0 public-domain work it can be used commercially, modified and redistributed with no fee and no attribution required.

“Doorknob” by Karl L. H. Müller (ca. 1876) is a public-domain (CC0) artwork, free to view, download and reuse for any purpose. It is catalogued from the open collection of The Metropolitan Museum of Art.

Doorknob

Karl L. H. Müller

Title	Doorknob
Artist	Karl L. H. Müller
Date	ca. 1876 19th century
Medium	Porcelain
Origin	American American
Holding institution	The Metropolitan Museum of Art
Credit line	The Florence I. Balasny-Barnes Collection, Gift of Florence I. Balasny-Barnes, 2008
Rights	Public domain (CC0)

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