Primarily a Germanic development in Middle Ages castle and fortification building, Tower Castles were seen around the 11th thru 16th Centuries. Designed along the Bregfield Class of structures, a large central Defensive Tower (similar with a Keep or Donjon) was constructed – usually on a hill top or plateau. A raised stone platform (serving as the foundation) was constructed along with a suitable defensive perimeter wall system (normally only to encircle the foundation area). Very similar to the standard Motte and Bailey system, Tower Castles did not typically require a pre-raised or constructed earthen berm or hill. Many of these Tower Castles were built in mountainous locales and could support a Lord's Family and a small garrison. Most of these structures would evolve into later Fortified Estates.