A new kind of castle appeared in France as part of the city defenses.
The barbican of the gate became a large independent castle known as a
bastille. As military architecture, the bastille was a new form, also called
a “block castle,” in which the eight towers and walls of a rectangular
building were the same height and created a large terrace that could be
used as a firing platform. The Castle of Saint Antoine at the northeast
entrance to Paris, built between 1370 and 1382, became the infamous
Bastille prison destroyed by the people in 1789 at the beginning of the
French revolution.