deux grandes campagnes de datation au radiocarbone (en) radiocarbon dating in 1984 and 1995 built Радиоуглеродный анализ деревянных останков 1985 года. don't know for sure how old it is 2589 and 2504 BCE How Old are the Pyramids 2589 and 2504 BCE http://www.aeraweb.o...e-the-pyramids/ How Old are the Pyramids aeraweb.org Радиоуглеродный анализ деревянных останков 1985 года. built How Old are the Pyramids? http://www.aeraweb.o...e-the-pyramids/