The Wilbour Plaque - Egypt ca. 1352-1336 B.C.E. or slightly later

The Wilbour Plaque is named for the early American Egyptologist Charles Edwin Wilbour (1833–1896), who acquired it in Egypt in 1881. It was intended as a sculptor's model, to be studied and imitated by students and beginning artists.

Source: brooklynmuseum.org