Castles were more than military posts; they were the centers of political and economic power. As government headquarters they were built to impress the local population as well as visitors and rivals. While power was spread among great tenants-in-chief in a system of delegated government, castles in each territory were places where local lords collected taxes, settled disputes, and administered justice.

Ch. 3 : The Castle as Headquarters : The Political and Economic Role of the Castle - Medieval castles (2005)