Has this ever happened before? A king or queen loses a crown only to become a king or queen of another state/country?
I'm not thinking of monarchs that gained another crown, like James VI, King of Scots who inherited the English throne. Or his grandson Charles II who was restored to a throne.
What I am thinking of is a king or queen that lost the throne of one country only to gain the throne of another?
The only ones I can think of were Christian VIII of Denmark and Holy Roman Emperor Franz II who lost that throne but became Emperor of Austria?