Scene at the Signing of the Constitution of the United States

George Washington, who presided over the convention, stands on the dais. The central figures of the portrait are Alexander Hamilton, Benjamin Franklin and James Madison.

This is an image of the signing of the Constitution of the United States with George Washington presiding over the Philadelphia Convention.
Citation (Chicago Style): 

Christy, Howard Chandler. Scene at the Signing of the Constitution of the United States. Painting. 1940. Located in the United States House of Representatives. https://commons.wikimedia.org/wiki/File:Scene_at_the_Signing_of_the_Cons... (accessed July 30, 2018).

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Public Domain

Public Domain is a copyright term that is often used when talking about copyright for creative works. Under U.S. copyright raw, individual items that are in the public domain are items that are no longer protected by copyright law. This means that you do not need to request permission to re-use, re-publish or even change a copy of the item. Items enter the public domain under U.S. copyright law for a number of reasons: the original copyright may have expired; the item was created by the U.S. Federal Government or other governmental entity that views the things it creates as in the public domain; the work was never protected by copyright for some other reason related to how it was produced (for example, it was a speech that wasn't written down or recorded); or the work doesn't have enough originality to make it eligible for copyright protection.