Although the Great Wall of China was an architectural wonder, it lacks
many key structural features. However, it does include a few. The doorways
in the wall are arched, much like those of the Romans. Curved bricks were
stacked, ending with a keystone at the top. The arches distrubuted the
weight of the wall to the ground, minimizing the stress on itself.
Wooden beams assisted in the construction and supported the structure from
within. There are no intended cantilevers in the wall, although some may
argue the case of a brick that sticks out slightly.
