King in Prussia
When Elector Frederick III crowned himself Frederick I, King in Prussia, in 1701, the Duchy of Magdeburg became part of the new Kingdom of Prussia. King Frederick William I's 'allodification of the fiefs', or efforts to modernize feudal land ownership laws, was opposed by the duchy's Junker nobility, which feared losing their tax-exempt status. The nobles received judgements from the imperial court in Vienna protecting their rights in 1718 and 1725. Justus Henning Böhmer became chancellor of the province in 1743.