394 Years Old Civilization: No Tombstones Earlier Than i625

I could not find tombstones earlier than i1625 and that would consequently mean, it's not just 1000 years that they made up but more than 5600 years (if we take the 6000 years of human history as granted)! Ancestry profiles don't show earlier timelines than 1700s either, so I challenge you to find the oldest gravestone in your local cemetery!