Changes in Ecclesiastical Jurisdictions in Saint Pierre and Miquelon

Date	Change
1648.05.04	Diocese of La Rochelle was established (from Diocese of Saintes, from the suppressed Diocese of Maillezais and became suffragan of Bordeaux)
1763	Apostolic Prefecture of Îles Saint-Pierre et Miquelon was established (from Diocese of Québec)
1801.11.29	Diocese of La Rochelle exchanged territory with Diocese of Nantes and Diocese of Poitiers
1970.11.16	Apostolic Prefecture of Îles Saint-Pierre et Miquelon was promoted as Apostolic Vicariate of Îles Saint-Pierre et Miquelon
2018.03.01	Apostolic Vicariate of Îles Saint-Pierre et Miquelon was suppressed (to Diocese of La Rochelle)