Updated April 6th, 2024:
Added a link to the 867 vs 1066 comparison article
Added screenshots of two of the random events in the Persia region that can give you random artifacts
Confirmed that Achaemenid Drinking Vessels come in all 4 quality levels
Made a slight wording correction since I discovered Tengri artifacts do in fact exist in the game (though there are none in the 1066 start)
Added screenshots of using Accomplished Forger to buy artifact claims