Long ago, a group of small independent provinces in western Valisthea found strength in unity, and formed the Grand Duchy of Rosaria. After years of relative prosperity, the duchy now finds itself threatened by the spread of the Blight—a threat that, left unchecked, would doubtless usher the realm to ruin. Rosaria draws its aether from Drake's Breath, a Mothercrystal situated on a volcanic island off the coast. The Dominant of the Phoenix, Eikon of Fire, is enthroned as Archduke when they come of age.
The Grand Duchy of Rosaria (ロザリア公国, Rozaria Kōkoku?, lit. Principality of Rosaria) is a nation in the world of Final Fantasy XVI. Their emblem is that of a phoenix and the nation is led by the Archduke, the Dominant of the Phoenix.