Ancient Falmer Crown is an armor piece in The Elder Scrolls V: Dawnguard. It serves as the helmet for the Ancient Falmer Armor set, but is classified as a circlet rather than as a piece of armor.
The crown cannot be obtained without the use of console commands. The needed console command would be:
It can be upgraded with a Refined Moonstone ingot at a workbench, but since it has no armor rating, only the value is upgraded.
The full set with the crown equipped.