 | 1815 | 1816 | 1817 |  |
Date | Country | Change |
| 1816 |  Australia,  Norfolk Island | Apostolic Prefecture of New Holland was established (from Apostolic Vicariate of London District) |
| 1816 |  France | Diocese of Ajaccio lost territory to Diocese of Grosseto and Diocese of Massa Marittima e Populonia |
| 1816.01.25 |  Gibraltar | Apostolic Vicariate of Gibraltar was established (from Diocese of Algeciras and Diocese of Cádiz) |
| 1816.09.12 |  Italy | Diocese of Caltagirone was established (from Metropolitan Archdiocese of Messina and Diocese of Catania, gained territory from Diocese of Siracusa and became suffragan of Monreale) |
| 1816.09.12 | Italy | Diocese of Siracusa lost territory to Diocese of Caltagirone |
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