Is “Door Knocker” in the public domain?

Yes. “Door Knocker” 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 “Door Knocker” 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.

“Door Knocker” by Regina Henderer (c. 1938) is a public-domain (CC0) artwork, free to view, download and reuse for any purpose. It is catalogued from the open collection of National Gallery of Art (Washington).

Door Knocker

Regina Henderer

Title	Door Knocker
Artist	Regina Henderer
Date	c. 1938 20th century
Medium	watercolor and graphite on paperboard
Classification	Index of American Design
Holding institution	National Gallery of Art (Washington)
Credit line	Index of American Design
Rights	Public domain (CC0)

About this artwork

“Door Knocker” is a work by Regina Henderer, dated c. 1938. It is executed in watercolor and graphite on paperboard and classified as index of american design. This work is in the public domain (CC0), so the image may be downloaded and reused for any purpose without permission (see the licence note below).