Think you know your castles from your palaces? From royal residences and fairy-tale fortresses to ancient citadels that shaped world history, this quiz will take you on a journey through centuries of grandeur. Some of these landmarks are tourist magnets; others are tucked away gems known only to historians and travelers in the know. You’ll hop from Europe to Asia, across deserts, forests, and rivers, as you prove your knowledge of global architecture. Most people can’t even name half of these royal masterpieces — but maybe you’re ready to wear the crown.