The Crown of King Arthur is the former crown of King Arthur.
When Camelot fell to Goth invaders, the crown was hidden in Ancient Germania, where it was hidden in a secret henge in the Black Forest. Lamia later took the crown, when she and the Serpent Brotherhood raided the library. It appeared again in the episode the wrath of chaos where it is being put on the pillow on shelf by Jenkins
- The crown was made to help build Camelot, and to control Arthur's weapons of power.