| name | image | type | Context | date effective | Language | location | date signed | Country | continent | depositary |
|---|---|---|---|---|---|---|---|---|---|---|
| Treaty of Rome |  | Founding | Comunità europea [Comunit%C3%A0_europea] | 01/01/1958 | Italian language | 25/03/1957 | Italy | Europe | Gobierno de Italia | |
| Euratom Treaty | Founding | Comunità europea [Comunit%C3%A0_europea] | 01/01/1958 | Italian language | 25/03/1957 | Italy | Europe | |||
| Treaty of Brussels | Founding | guerra fredda [Guerra_fredda] | English language | Brussels | 17/03/1948 | Belgium | Europe |