You Do Need power plug adapter while traveling from Saint Vincent and the Grenadines to Vatican City.

Here is Why You Need An Adapter

The outlet and plug type used in Vatican City are C, F and L and in Saint Vincent and the Grenadines are A, B and G. This is how they look like.

Saint Vincent and the Grenadines

In Saint Vincent and the Grenadines, outlets of type A, B and G are in use.

Type A

Type B

Type G

Vatican City

In Vatican City, outlets of type C, F and L are in use.

Type C

Type F

Type L