The castles were used to defend an area.
knights and lords built castles to protect themselves from their enemies. they were also used to entertain guests, and for housing purposes. that is why they built castles.
They were used to bombard castles with large stones.
arrows and slingshots
Concentric castles had baileys, an inner bailey and an outer bailey. The inner bailey was used for the peasants homes and the outer bailey was used for blacksmith workshops and other craftsmen's workshops.
In forts and castles during the middle ages they built galleries on brackets on the outside walls and parapets which had an opening in the floor to pour molten lead boiling oil and missiles onto the enemy which they called a machicolation
I believe you are talking about parapets, the stones with space left between them to allow archers to fire without exposing themselves No, the parapet is what you are standing on. Battlements are the 'jagged things', otherwise known as crenellations.
Sand/dirt , sandbags , shovels , and a lot of human energy .
Motte and Bailey castles and Concentric castles
In 1066 Motte and bailey castles were used
Parapets
Three
they stopped using castles because they did
Battlements
The castles were used to defend an area.
Hey used stone to build the castles.
Castles in the Middle Ages were used to keep out enemies.