Because they discovered new technologies.
the normans, they were motte and baily castles
Around 1066 (i think) :)
A castle baily is part of the "Motte and Baily" castles. The motte is the massive, man-made hill, where the castle is built on. The baily is the slightly smaller hill, where the village and "town" is built.
Stones Wood Motte and Baily( wood and stone)
a motte is the grounds werte they keep is placed and the baily is lower ground were the knights sleep GOD KNOWS
mott and baily castles were made out of wood and stone castles were made out of stone.
motte and bailey castles consist of a hill/motte, a bailey which was a living area for the soldiers and the castle which was made out of wood
Usually from stone, but early motte and baily forts were made of wood. Some fortresses in Eastern Europe were made of brick, since stone is scarce there.
King William had people in Mot and Baily castles keeping towns and citys on track.
1.If the castle wasn't on solid ground, then it would fall straight thought the mud, stupid!! 2. because the keep castles were heavier than the Mount and Baily castles so if they were on a hill it would claps.
He died on his horse. He was so fat he wouldn't fit in his coffin. He was Norman. He built the first Mott and Baily castles. He comissioned the Bayeux tapestry.
it where they keep baily=)