Imperial immediacy was a privileged constitutional and political status rooted in German feudal law under which the Imperial estates of the Holy Roman Empire such as Imperial cities, prince-bishoprics and secular principalities, and individuals such as the Imperial knights, were declared free from the authority of any local lord and placed under the direct authority of the Holy Roman Emperor, and later of the institutions of the Empire such as the Diet, the Imperial Chamber of Justice and the Aulic Council. Wikipedia