This chapter discusses very selective survey of the Protestant Prussian church order and its development in the period under consideration. Prussian Protestantism after 1918, therefore, stood for a church politicized ideologically by the lost war and the loss of its king. The directing royal hand in nineteenth-century Prussian church affairs was still really felt. Loss of the monarchy was thus a ‘crime’ for many. Whether one should couple the adjective ‘Prussian’ with Protestantism and emphasize it, was a question which this very small and scattered, but nevertheless active, opposition learnt to ask the hard way of experience in these terrible years. A Prussian Protestant identity and the larger Protestant German whole can all too easily be lumped together nationally, though both have influenced each other as anomalous and plural customary orders of church provinces continuously since the Reformation. The Prussian United Church was, in the sense of an established royal Anglican or Swedish Lutheran Church, an early nineteenth-century creation.