Could someone post here some names of artifacts that are know for having been used by Legion members and are of great importance to the Legion? I can think of Goldbrand and Lord's Mail, also the new Champion's Cudgel in Skyrim (not an artifact I guess, but still unique)

Imperial Dragon armor? normally worn only by the Emperor himself.

The Dragon Armor is made out of ebony and gold right? Dragon bones and scales would be impossible to get before their return in the 4th Era

Probably Chrysamere, and maybe (?) the Boots of the Apostle and Skull Crusher as well.

Chrysamere.

Are there any in Skyrim? Maybe I could recreate Chrysamere and/or the Skull Crusher in Dragonborn, though it would be far from perfect