A version of the Cornish flag that can be seen in Donald MacLeod's 1996 painting "The Cornish army crosses the River Tamar", which depicts an event from the Cornish rebellion of 1497.
<a href="//commons.wikimedia.org/wiki/User:Sushant_savla" title="User:Sushant savla">Sushant savla</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>, based on <a rel="nofollow" class="external autonumber" href="https://davedoeshistory.files.wordpress.com/2020/06/cornishrebellion1497.jpg?w=480">[1]</a>