The bishopric was dissolved in the German Mediatisation of 1803, when it was incorporated into the neighboring Electorate of Hanover. The see, the chapter, the convents and the Catholic charitable institutions were secularized. The territory of the see passed to Prussia in 1806, to the Kingdom of Westphalia in 1807, to Napoleonic France in 1810, and back to Hanover in 1814.