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They did not change from shell keep castles to square keep castle, they existed at the same time.
Most shell keeps were a result of replacing the wooden towers on top of the man made Mottes (erected as a quick way of making a castle) with stone buildings, as they were man made it was often thought they would not take the weight of keep with very tall thick walls like the Tower of London so they made shell keeps, with thinner walls.
To build a substantial keep they would have to demolish the Motte. You would have thicker stronger walls with a square tower, but the extra height on top of the motte is also a defensive advantage, and it woule be cheaper.
What else can I help you with?
How are rectangular and square pyramids different?
they are different because there bases are different
Is 25 a rectangular number?
25 is a square number. Some people maintain that that makes it rectangular; others disagree.
How is a cube different from a rectangular prism?
A cube is like a square and a rectangular prism is like a rectangle.
How are a cube and a rectangular prism alike and different?
They are alike, because they both have square bottoms. They are different, because the rectangular prism is longer.
How are rectangular prisms and cubes different?
Cubes have a square on each side, but rectangular prisms have rectangles or squares.
What types of castles comes after square stone keeps?
After square stone keeps, the next evolution in castle design included rectangular stone keeps and then the development of concentric castles. Rectangular keeps offered improved defensive capabilities and more efficient use of space. Concentric castles featured multiple layers of walls with inner and outer defenses, enhancing protection against sieges. This design allowed for better strategic positioning and greater resilience during attacks.
What are square and rectangular profiles?
profiles that are square and rectangular
How is a cube different from a rectanguler prism?
A cube has 6 square faces, while the 6 faces on a rectangular prism are rectangular.
What did square keep castles change into?
concentric castles
How are rectangle pyramids different from a square pyramids?
It means that it has a rectangular base rather than a square 1 :)
Where were square keep castles built?
Square keep castles were mainly built far from villages
When did square keep castles turn into concentric castles?
YEAH!
