- bishop ric . ▁ ▁( ab bot / bishop ▁ 1 7 7 6 - 9 4 ) ▁and ▁ ▁( bishop ▁ 1 7 9 4 - 1 8 2 5 ) ▁were ▁the ▁last ▁ecc les ial ▁princes ▁at ▁Cor vey . ▁ ▁In ▁ 1 8 0 3 , ▁the ▁Prince - B ishop ric ▁of ▁Cor vey ▁was ▁sec ular ized ▁under ▁Napole onic ▁administration ▁and ▁became ▁briefly ▁part ▁of ▁the ▁Princi p ality ▁of ▁N ass au - O range - F ul da . ▁In ▁ 1 8 0 7 , ▁it ▁went ▁to ▁J ér ôme ▁Bon ap arte ' s ▁Kingdom ▁of ▁West phal ia . ▁After ▁the ▁Congress ▁of ▁Vienna , ▁Cor vey ▁fell ▁to ▁the ▁Pr uss ia ▁in ▁ 1 8 1 5 . ▁As ▁compens ation ▁for ▁lost ▁territory ▁west ▁of ▁the ▁Rh ine , ▁it ▁was ▁awarded ▁to ▁Victor ▁Ama de us , ▁the ▁Land gra ve ▁of ▁H esse - R oten burg , ▁in ▁ 1 8 2 0 . ▁ ▁While ▁Cor vey ▁had ▁ceased ▁to ▁exist ▁as ▁a ▁political ▁state ▁in ▁ 1 8 0 3 , ▁it ▁continued ▁to ▁exist ▁as ▁a ▁dioc ese ▁until ▁ 1 8 2 5 . ▁ ▁Schloss ▁Cor vey ▁ ▁Land gra ve ▁Victor ▁Ama de us ▁re built ▁the ▁ab bey ▁buildings ▁as ▁a ▁Schloss ▁( pal ace ). ▁In ▁ 1 8 3 4 , ▁the ▁property ▁fell ▁to ▁Victor ▁von ▁H ohen lo he -