6th PanAfrican Prehistory Congress September 10, 2018 1967 cachet Central African Republic lithic megalith ofdc +
Dolni Vestonice January 27, 2018 1985 2017 cachet cancel ceramic Czech Republic museum ofdc postcrossing venus +
Paleolithic Age April 09, 2017 2017 bone cachet cancel ivory lithic mini sheet ofdc postcrossing registered rock art shell Ukraine venus +
Lascaux July 26, 2016 1968 2015 Bosnia and Herzegovina cachet cancel France maxicard ofdc postal stationery rock art unesco +
Pula Arena November 08, 2013 2014 2016 2017 cachet cancel Croatia First Flight ofdc postal stationery postcrossing +
Ljubljana Marsh August 08, 2013 2008 2013 cachet ceramic fdc mini sheet museum Slovenia unesco wood +
Silk Road February 06, 2013 1973 1994 2012 cachet China Great Britain metal mini sheet pex postcard +
Biskupin October 01, 2012 1966 bronze cachet ceramic Iron Age museum Poland postal stationery postcard postcrossing +