The bailey.
A stone or square keep castle is the extention of a motte and bailey castle.
square stone keep castle
A Square Keep Castle is an extension from a motte and bailey castleand can be called two different things, Square Keep Castle or a Stone Keep Castles. The reason from both of these names is that they were square and they were made out of stone.
A Square Keep castle usually sits on a hill. It only has 1 wall of defence, whereas a concentric castle usually has about 3 thick walls. Concentric's also have a keep in the middle that has a wall 2.5 metres thick!
motte and bailey
Yes as a stone castle does not rot, burn, or can be attacked manually
A Motte and bailey castle is made of mud and wood and a stone castle is made of stone. A Motte and Bailey castle sets on fire easily, Rots and isn't very strong. Stone castles, however Does not set on fire easily, doesn't rot and is very strong. Stone castles also have turrets and extra walls for added safety.
Concentric
Leeds Castle is primarily classified as a stone keep castle. Originally built in the 9th century, it has undergone significant modifications over the centuries, transforming into a more elaborate stone structure. Unlike motte and bailey castles, which feature a wooden or earth mound (motte) and an enclosed courtyard (bailey), Leeds Castle's design reflects the characteristics of a fortified stone castle.
It was a motte and bailey castle, later turned into a stone keep castle.
motte and bailey
Because Of The Stone And Wood