Date
| Event
| From
| To
|
Prefecture Apostolic of San Leon del Amazonas
|
5 February
1900
| Erected
| Diocese of
Chachapoyas
| Prefecture Apostolic of San Leon del Amazonas (erected)
|
4 October
1912
| Territory Lost
| Prefecture Apostolic of San Leon del Amazonas
| Prefecture Apostolic of
Putumayo
(erected)
|
Vicariate Apostolic of San Leon del Amazonas
|
22 February
1921
| Elevated
| Prefecture Apostolic of
Putumayo
(suppressed)
Prefecture Apostolic of San Leon del Amazonas
| Vicariate Apostolic of San Leon del Amazonas
|
27 February
1921
| Territory Lost
| Vicariate Apostolic of San Leon del Amazonas (Regions around the Maranon River)
| Prefecture Apostolic of
San Gabriel de la Dolorosa del Maranon
(erected)
|
13 July
1945
| Territory Lost
| Vicariate Apostolic of San Leon del Amazonas (Northern and Eastern part)
| Prefecture Apostolic of
San Jose de Amazonas
(erected)
|
Vicariate Apostolic of Iquitos
|
1 August
1945
| Name Changed
| Vicariate Apostolic of San Leon del Amazonas
| Vicariate Apostolic of Iquitos
|