Golden armillary sphere on a stand, in heraldic image style.
<a href="//commons.wikimedia.org/wiki/User:Tonyjeff" class="mw-redirect" title="User:Tonyjeff">Tonyjeff</a>, based on ancient national symbol.
Own work based on: <a href="//commons.wikimedia.org/wiki/File:Flag_Manuel_I_of_Portugal.svg" title="File:Flag Manuel I of Portugal.svg">Flag Manuel I of Portugal.svg</a>