"Conrad II of Reifenberg (German: Konrad II.; late 12th century – 18 December 1249) was Bishop of Hildesheim from 1221 to 1246. During his tenure, the ...
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Bishopric of Hildesheim was raised to an Imperial State (Hochstift), when Conrad was vested with secular rights of a prince-bishop by Emperor Frederick II in 1235." - (en.wikipedia.org 19.04.2021)
