# Door Knocker

- By: Frank Gray (American, 1889 - 1962)
- Date: c. 1940
- Medium: watercolor and graphite on paperboard
- Classification: Index of American Design
- Dimensions: overall: 42.5 x 34.7 cm (16 3/4 x 13 11/16 in.)
- Culture: American
- Credit line: Index of American Design
- Museum: [National Gallery of Art](https://www.nga.gov/collection/art-object-page.21783.html)
- Rights: [Public domain (NGA Open Access, CC0)](https://creativecommons.org/publicdomain/zero/1.0/)
- Picture: https://invisiblenetwork.ai/thumbs/nga/d0e21f2f-1439-408b-9f48-e4ad00314df5/full/!1920,1080/0/default.jpg
- Who can see it: Teens profiles and older (museums give no ratings; placed by Invisible Network from the museum's own words)