Arrows can easily fly over the top into the castle, which is apparent in nearly all castles. There are not many other weaknesses, although the outer wall is slightly skinnier due to its shape. Also, enemies can easily surround the castle for no means of escape.
the problem with these type of castles was that there were many windows
Shell keep castles are round rather than boxed. A castle that forms a circle is a perfect example. There are many in England.
Shell keep castles are medieval fortresses that are usually built upon a motte. They are made from stone. Some examples of stone keep castles include the Round Tower on Windsor Castle and the Clifford's Tower on York Castle.
The Motte and Bailey style of castle had two major weaknesses. Frequently the motte was too weak to support the castle. It would simply topple over. Second, an enemy could tunnel through the motte and attack the castle that way. If the castle were build first, the tunnel could reach the castle without the defenders knowing where the attackers were until it was too late. The shell keep style did not have that problem. In fact, it could be made round so that cannon balls would glance off.
A shell on a castle is the round part on top. Since Norman Motte and Bailey castles were first made of wood, the castle was not sturdy enough to support the shell.
I only no the weaknesses and that is because the castle had corners it had blind spots when being attacked by the enemies
Stone
Round Keep Castles were a type of castle during the medieval times. They were not built on a motte, unlike shell keeps. They were an adaptation of the square keep castles except they had round or polygonal walls. Medieval builders couldn't make the round keep castles as big as the square keep castles, so they were often cramped for space.
Round!
they were round and they had a keep . for a better explanation click on images at the top of google and search for round keep castle- then loads of pictures of round keep castles will come up
The square keep probably came first because it seemed to be more developed then the shell keep
round keep castle.