The middle-sized German electorate and kingdom of Hannover gives an interesting example for the development of judicial control of administrative acts and stately power in the 18th and 19th century. Already in 1711, the elector George 1st established the Higher Court of Appeal in Celle and laid the control of administrative acts in the hands of independent judges according to the court order of 1713. Therefore, the Higher Court of Appeal may be qualified as a constitutional court in the early 18th century. The severe constitutional crisis in 1837 seemed to indicate a break, but it can only be understood if one considers, on the one hand, the interpretation of the constitution concerning a regency and, on the other, the physical condition of the crown prince. Only three years later, the new constitution of 1840 tried to connect with the tradition of 1711/13 and thus secured the review and control of administrative acts and the judgements of lower courts by independent judges of a higher court.