The square keep probably came first because it seemed to be more developed then the shell keep
In Britain, the first stone keep castle was built around 1100.
in the year 1350
When the warfare became more advanced.
when was the first circular keep castle built
Norwich tower was the first stone keep
The first stone castle was built in the city of norwich in the 12th century by duke William of Normandy
Caesar's tower and Guys' tower were the first to be built but the oldest part that was ever built was the keep in the motte and bailey castle.
William the Conqueror
Round Keep Castles were a type of castle during the medieval times. They were not built on a motte, unlike shell keeps. They were an adaptation of the square keep castles except they had round or polygonal walls. Medieval builders couldn't make the round keep castles as big as the square keep castles, so they were often cramped for space.
12th centory 1189
The Warwick Castle was built in the year 1068. The Warwick Castle was built to help William the Conqueror keep control of the midland area as he advanced. The first church was founded in the castle in 1119.
Round!
they were round and they had a keep . for a better explanation click on images at the top of google and search for round keep castle- then loads of pictures of round keep castles will come up
round keep castle.
they built round keep castles because they did