This image was taken from Flickrs The Commons. The uploading organization may have various reasons for determining that no known copyright restrictions exist, such as: 1. The copyright is in the public domain because it has expired; 2. The copyright was injected into the public domain for other reasons, such as failure to adhere to required formalities or conditions; 3. The institution owns the copyright but is not interested in exercising control; or 4. The institution has legal rights sufficient to authorize others to use the work without restrictions.