File:Rongorongo-dietrich-ursamajor-manukakioa-birdwithlongneck.png

Summary
The rongorongo writing system was invented by the Rapa Nui/Polynesian people sometime before European contact (medieval/early modern). The original authors of the script are unknown, and their work pre-dates any active term of copyright. Moreover, rongorongo is a writing system and is ineligible for copyright.
 * Other information: