Roman Catholic Diocese of Porto Novo
- April 5, 1954: Established as Apostolic Vicariate of Porto Novo from Apostolic Vicariate of Ouidah
- September 14, 1955: Promoted as Diocese of Porto Novo
The Cathedral of the diocese is Cathédrale Notre Dame de l’Immaculée Conception in Porto Novo.
- Bishops of Porto Novo (Roman rite), in reverse chronological order
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