Flag of Spain, the "rojigualda".
<a href="//commons.wikimedia.org/wiki/User:RelShot_263" title="User:RelShot 263">RelShot 263</a>, <a href="//commons.wikimedia.org/wiki/User:Echando_una_mano" title="User:Echando una mano">Echando una mano</a>
1843-10-13
<span class="int-own-work" lang="en">Own work</span>