centrifugal force
This is because the keep itself is made out of Stone. they were built in medieval times.
No, a square keep and a stone keep are not the same, although they can overlap in meaning. A square keep refers specifically to the shape of the tower, typically with four equal sides, while a stone keep denotes the material used in its construction—stone. A square keep can be made of stone, but not all stone keeps are square; they can come in various shapes, including rectangular or circular.
Stone.
stone
stone
Power Stone happened in 1999.
The Omega Stone happened in 2003.
Stone Protectors happened in 1994.
because the square stone keep was not good enough to handle retakes
the stone castle has a mote and stone walls
A stone or square keep castle is the extention of a motte and bailey castle.
A stone keep refers to a castle that is built of stone. Using stone allows for castles to be build higher than with wood and also prevented against fire.