a structure used to defend against attack

a fortified Moorish palace built near Granada by Muslim kings in the Middle Ages

a fortress built in Paris in the 14th century and used as a prison in the 17th and 18th centuries; it was destroyed July 14, 1789 at the start of the French Revolution

a fortress in London on the Thames; used as a palace and a state prison and now as a museum containing the crown jewels

Inca fortress city in the Andes in Peru discovered in 1911; it may have been built in the 15th century

a rampart built around the top of a castle with regular gaps for firing arrows or guns

any of various Spanish fortresses or palaces built by the Moors

a circular masonry fort for coastal defence

a fortress established in the southwestern United States by the Spanish in order to protect their missions and other holdings

a small fort or earthwork defending a ford, pass, or castle gate

a small Roman detached fort or fortlet used as a watch tower or signal station.

a fortified Moorish palace built near Granada by Muslim kings in the Middle Ages

a fortress built in Paris in the 14th century and used as a prison in the 17th and 18th centuries; it was destroyed July 14, 1789 at the start of the French Revolution

a fortress in London on the Thames; used as a palace and a state prison and now as a museum containing the crown jewels

Inca fortress city in the Andes in Peru discovered in 1911; it may have been built in the 15th century

a rampart built around the top of a castle with regular gaps for firing arrows or guns