Notre Dame gets 'pitch perfect' bells to mark 850 years
23 March 2013 Last updated at 09:53 GMT
The Cathedral of Notre Dame is to celebrate its 850th anniversary with a new set of bells.
They will ring for the first time on Saturday to mark the beginning of the Easter programme.
They will recreate the notes of the original set of bells, which were destroyed in the French revolution.
Christian Fraser reports.