how to get rid of unwanted artifacts?

Hi, I admit I got a bit overzealous (first playthrough that got me so far) and I've excavated a hoard of artifacts that promptly filled all my slots. Now I want some theme bonuses but for that I need a free art slot.

Is there any way to get rid of the numerous beads and swords I've got stuck in my museums? I mean ok, in the future I'll be just more careful but just curious if there is an option...