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Caliphs, considered successors of the Prophet Muhammad, were the most important religious...
The equipment of ancient Chinese soldiers was rudimentary.
This animation shows the hierarchical structure of the Medieval Christian church.
The ruler of the vast Mongol Empire was the Khan.
The largest type of Arab sailboat, most commonly used as trading vessels in the Persian Gulf.
The building complex was one of the most important Benedictine abbeys for centuries.
The most important weapons of medieval Arab warriors were the bow and the sword.
Several ingenious instruments have been invented over the centuries to help in navigating the seas.