What date did motte bailey castles change after time?

There is no specific date when motte bailey castles changed. Rather, they gradually evolved over time. The earliest motte and bailey castles were built in Europe in the 10th century. They consisted of a large mound of earth (the motte) surrounded by a ditch and a wooden palisade. The motte was surmounted by a wooden tower or keep. Over time, stone walls replaced the wooden palisades and the keeps became more elaborate. In the 12th century, stone castles began to replace motte bailey castles.