Kings who relied heavily on political movements to cement their power mark the Donoxian Royal line. This begins with the adoption of the Dannunifian Constitution of 1808, which established a constitutional monarchy. Several wars with Treyland and lasting peace with Jamsterdavania also mark the Donoxian age.

The final Donoxian king was Marcos Donox who reigned from 1937 to 1954. Since he died with no heir apparent, a Crown Protectorate was appointed. Crown Protectorate Alberto De Colon found no true Donoxian heirs and, therefore, extended the regal sentence on Daniel Monoxius, the Duke of Gualica. So began the Monoxian age.