Square Castles had connected walls which can be burnt from one corner to another. This can happen by digging a tunnel and throwing fire. This feature can affect the whole castle because it can burn down.
the problem with these type of castles was that there were many windows
Restormel castle
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A shell Keep is a rounded shaped castle which was built in the midevil times !!!!by Lauren xxx
about 37, 38
They were built in the year 1172
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.
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.
They Were First Thought Of in 1172. By Ellie W
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.
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 were built in the year 1172! +++ Not sure where the adjective "shell" comes from, but castles with a keep - the central building in the complex, and the main accommodation - were built mainly in the few centuries of the Mediaeval period , not just in one arbitrary year.