Roman Catholic Diocese of Hildesheim partially coincident with Prince-Bishopric of Hildesheim
Prince-bishopric
Between 1235 and 1802, the bishop of Hildesheim was also Prince of the Holy Roman Empire. His Hochstift (feudal princely territory) was the Prince-Bishopric of Hildesheim. In the 16th century, most of the diocese as well as most of the state of Hildesheim switched to Protestantism, but the bishopric managed to retain its independence from the surrounding Protestant states of Brunswick-Lüneburg, mostly because its bishops were members of the powerful House of Wittelsbach from 1573 until 1761.Diocesan ambit
Until 1824 the diocesan ambit remained unchanged, despite various changes of the political borders in history up to this date. After the Napoleonic wars the newly established Kingdom of Hanover stipulated with the Holy See to extend the Hildesheim diocesan ambit to all of the then Hanoverian territory east of the Weser river. The newly included areas were Lutheran with a little Catholic diaspora and had formed part of the defunct dioceses of Bremen, of Mainz and of Verden before the Reformation.
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