Aim: To see how castles developed through time
I think the motte and bailey castle must have been built first as it is wooden and stone and brick wouldn't have been used at that time for building castles. It would have been much quicker and much easier to build a motte and bailey than build a stone castle. It would have rotted and the wood could be burnt.
The next building would be the square stone keep (source 1). It is a very simple square building. The keep is the main building in a castle. The walls are about 5 metres thick because, people didn't use guns as weapons-they used catapults. The walls could take the boulders hitting it for quite a while.
The windows are small so, archers can't shoot into there. The windows get wider as they go in so, someone can defend the castle through the windows.