Biskupin October 01, 2012 1966 bronze cachet ceramic Iron Age museum Poland postal stationery postcard postcrossing +
Panagyurishte Treasure July 13, 2012 1966 1999 2010 2012 Bulgaria gold joint issue Kazakhstan maxicard postal stationery postcard registered +
Chersonesus June 13, 2012 2005 2013 2015 mini sheet postal stationery postcard postcrossing Russia Ukraine unesco +
Kurgan Stelae January 30, 2012 2005 2014 mini sheet postal stationery postcard postcrossing Russia Ukraine +