6th PanAfrican Prehistory Congress September 10, 2018 1967 cachet Central African Republic lithic megalith ofdc +
A History of Ireland in 100 Objects January 27, 2018 2017 2018 ATM Bronze Age ceramic Ireland lithic postcrossing +
Paleolithic Age April 09, 2017 2017 bone cachet cancel ivory lithic mini sheet ofdc postcrossing registered rock art shell Ukraine venus +
Mesa Verde October 17, 2011 1977 1980 1984 ArtCraft cancel ceramic lithic ofdc postcard postcrossing Sarzin unesco USA +
Venus of Moravany March 15, 2011 2006 ivory lithic museum ofdc postcard postcrossing shell Slovakia venus +