- 1844: Established as Apostolic Prefecture of Micronesia / Micronesiæ (Latin) (from Apostolic Vicariate of New Zealand)
- 1886.05.15: Lost territory to establish Mission sui juris of Eastern Carolines and Mission sui juris of Western Carolines
- 1887: Promoted as Apostolic Vicariate of Micronesia / Micronesiæ (Latin)
- 1889.05.10: Suppressed (to Apostolic Vicariate of New Britain)
