Building the fictional monarchy
The fictional monarchy needs internal consistency more than historical accuracy. Establish a small number of rules that do genuine dramatic work: a succession law that creates the central conflict, a protocol that forces your characters into proximity or separation, a court hierarchy that determines who holds real power beneath the ceremonial surface. The monarchy should feel like it has been operating for generations — which means its rules have accumulated historical weight, its rituals have reasons nobody fully remembers, and its contradictions have been institutionalized rather than resolved. The world-building mistake is the monarchy as backdrop: all golden rooms and no actual governance. The monarchy that constrains your characters in specific, legible ways is the one that makes royal romance feel like a real world rather than a fairy tale.