This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929. Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country. Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Flag_of_Schenectady,_New_York.png

This image of simple geometry is ineligible for copyright and therefore in the public domain, because it consists entirely of information that is common property and contains no original authorship.

This flag is made up of two parts, the city seal and basic geometry. There is no publishing date for the city seal but it was in this 1860 publication [1] meaning it was made before then, putting it in the public domain. The basic geometry in the background is ineligible for copyright putting the entire flag in the public domain.