Castles

A castle is a properly fortified military residence. They were designed and built to hold down conquered territory. They also served to intimidate and strike fear into the local peoples, were places of refuge, and places for the lords to live. They were also impressive symbols of the power and wealth of their owners.
Main elements of castle are:
Towers
Wall
Gatehouses
Ditches and drawbridges
Loopholes
Special windows
Spiral stairways

Towers
Over time, the shape of the towers changed as castle- builders experimented with designs that were less likely to fall down in battle or from the instability of the structure itself…