Lorenzo's Crown

Lorenzo's Crown is an unobtainable apparel item worn by Lorenzo Cabot in Fallout 4.

Background
Lorenzo's crown was an artifact found in Ubar, in the Empty Quarter of Arabia in 1894. Lorenzo Cabot was chief of an archaeological dig to prove the existence of ancient civilizations when he stumbled upon the artifact, rumored to be supernatural by his guide. Despite the protests of the guide, who later left the group due to the feared repercussions of disturbing the artifact, Lorenzo chose to return for it unbeknownst to the rest of his group and then returned to Boston with it in his possession.

Little did Lorenzo know, the superstitions and fear of his guide and his excavation team were well-founded; the crown, when worn by Lorenzo, granted him supernatural powers including immortality, enhanced strength and localized telekinetic abilities. The crown also afflicted him with an insatiable bloodlust, however Lorenzo denies any such bloodlust. Upon discovery of these abilities, his family, specifically his son Jack, had Lorenzo and the artifact locked away below Parsons State Insane Asylum.

Location
The crown is found in the basement of Parsons State Insane Asylum, worn by Lorenzo Cabot, but is unobtainable without the use of console commands, unless you kill Lorenzo.

Behind the scenes
The crown's use and its effects are very similar to the Ayleid Crown of Nenalata from The Elder Scrolls IV: Oblivion. In both games, whoever wears the crown is presumably possessed by an unknown entity and gain powers far greater than their own.