Much of what we know about the Persians and their empire comes from an outsider writing about them, which is something we now call history. And one of the first true historians was Herodotus, whose famous book, The Persian Wars, talks about the Persians quite a bit. Now the fact that Herodotus was Greek is important because it introduces us to the idea of historical bias, but more on that in a second. So the Persian Achaemenid dynasty, Achaemenid? Hold on. Achaemenid or Achaemenid? They're both right?