Facebook has banned users trading in historical artefacts on the site.
It follows a campaign by academic researchers and an investigation by BBC News, exposing how items looted from Iraq and Syria were sold on Facebook.
One expert welcomed the move but said for anything to change, Facebook should invest in "teams of experts to identify and remove networks rather than playing whack-a-mole with individual posts".
Facebook says all trade in ancient artefacts is banned on its platforms.
The changes are included in a new set of Facebook Community Standards published on Tuesday.
They ban content that "encourages or attempts to buy, sell or trade historical artefacts" or "attempts to solicit historical artefacts".
Items sold in this way can include ancient scrolls, manuscripts, mummified body parts and ancient coins.