To defend their territory. and impose a point of power.
you would need about 99 people to build a castle.
sand.
You need craftsman for the design of the castle.
A baron could only build a castle if he'd been ordered by the king to do so.
On a hill!!
Go to the seashore and build a sand castle. Then try to build a water castle and/or an air castle. That should tell you everything you need to know to answer this question.
a long time!!
because they wanted to
you need to make sure you have enough guards to guard the castle its around 20
It took about 456 people to build a castle
it is quicker and easier to build the castle.
the normans The people needed to build a castle would be special workers