Royal rivalries are notorious not just for their grand scale, but also for the surprisingly small grievances that often sparked them—sometimes changing nations’ destinies in the process. From sibling squabbles to jealous spats over court ceremonies, these outrageous quarrels have shaped dynasties, redrawn borders, and even caused wars. Explore 17 of the most notoriously petty royal feuds that left an indelible mark on history.
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