For the DLC, see Crown of the Sunken King.

The Crown of the Sunken King is a head armor piece in Dark Souls II: Crown of the Sunken King. It is one of the three Lost Crowns.

In-Game Description

Crown of the Sunken King who once ruled this land.
The King erected the Eternal Sanctum below the earth to worship the great dragon, but the towering bulwark crumbled with the city shortly after the dragon's awakening.
But these were events of long ago, and today, no one even remembers the King's name.