In detail please?

Please explain!

Think about it. Why were they built in the first place?

Think about it. Why would someone build a huge multi-storied stone structure with small window openings, a flat roof that you can walk on, and dig a wide ditch around it all and fill that ditch with water?

Have a read here: Castle - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Castle)

Think about it. Why would someone build a huge multi-storied stone structure with small window openings, a flat roof that you can walk on, and dig a wide ditch around it all and fill that ditch with water?

Not really that helpful but thanks.

Not really that helpful but thanks.
I'm certainly not going to tell you the answer! YOU have to think! Is this a homeschool question?