A marquis (pronounced “mar-KEE” or “MAR-kwiss”) is a nobleman ranking below a duke but above an earl or count. In medieval Europe, a marquis originally governed border territories called marches, defending the kingdom's edges against invasion.

Marquises held significant power and land, commanding troops and administering justice in their regions. The Marquis de Lafayette, for instance, was a young French nobleman who became a hero of the American Revolution, helping George Washington's army win independence.

In England, the spelling is often “marquess,” while “marquis” is used in France and some other countries. A marquis's wife is called a marchioness. These titles are hereditary, meaning they pass from parent to child, and many European families still hold them today, though mostly as honors rather than roles with real political power.

You might encounter marquises in historical novels set in Europe, where they appear at royal courts, host grand balls on their estates, or play roles in political intrigues. The title represents an important piece of the social hierarchy that shaped European history for centuries.