|
| 1900 |
| 1933 |
| 1936 |
| 1954 |
Your answer was: 1933. |
Answer: Vatican City formally opened the central post office building on June 28, 1933. Pope PiusXI officiated at the inauguration ceremonies. Click here to William Wonneberger's article on the Vatican Postal Service in Vatican Notes to learn more details. |