This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code. Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see .

This work first published in the Ottoman Empire is now in the public domain because the Empire's copyright formalities were not met (copyright notice, registration, and deposit), or because the copyright term (30 years after the death of the author, sometimes less) expired before the Empire was dissolved (details).