Hello Val
Beaulieu abbey, not privately owned but restored by private individuals with state aid and then given together with art works to the state.
Given that active churches belong to the state, the proposal would appear to be moving a artifact from one state pocket to another. The link gives the relevant brief history.
http://mobile.monuments-nationaux.fr/en/monuments/recherche-libre/bdd/monum/58
Best regards,
Richard
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