The Bastille was originally constructed in 1370 as a bastide, or “fortification,” to protect the walled city of Paris from English attack. It was later made into an independent stronghold, and its name–bastide–was corrupted to Bastille. The Bastille was first used as a state prison in the 17th century, and its cells were reserved for upper-class felons, political troublemakers, and spies. Most prisoners there were imprisoned without a trial under direct orders of the king. Standing 100 feet tall and surrounded by a moat more than 80 feet wide, the Bastille was an imposing structure in the Parisian landscape.