This flag is derived from the royal flag of the last kings of the Árpád dynasty, the first dynasty which ruled the medieval Hungary. For more informations see <a href="https://en.wikipedia.org/wiki/%C3%81rp%C3%A1d_House_Flag" class="extiw" title="en:Árpád House Flag">en:Árpád House Flag</a>.
As a modern political flag, it is also  the semi-official symbol of a Hungarian christian nationalist party, the <i>JOBBIK Magyarországért Mozgalom</i> (Movement for a BETTER Hungary), founded in 2003. The flag is often borne also by the right-wing radical backers of the conservative parties in Hungary.
<a href="//commons.wikimedia.org/wiki/User:Pum" title="User:Pum">Pum</a>
2012-02-13
<span class="int-own-work" lang="en">Own work</span>