A motte-and-bailey is a form of castle. It was made of wood and many were built in Britain and France in the 11th and 12th centuries. Each took 7 to 14 days to build. There were very few Celtic/pre-norman motte and bailey castles. The Normans brought motte and bailey castles in packages like make your own furniture. The main weakness of the motte and bailey castle was that they were usually wooden and therefore burned easily.
Keep- The safest and highest part of the castle. The last line of defence.
Motte- usually buily by the local English people. About 15 meters high. There could be more than one.
Wodden Bridge- this led from the bailey to the starts climbing the motte.
Bailey- A large yard with storeroom, kitchens, stables and guardrooms. There could be more than one.
Palisade- the wooden fence surrounding the bailey.
Gateway & Drawbridge- the entrance to the bailey, guarded by the baron's soldiers.
Ditch- when filled with water it was know as a moat.