You Do Need power plug adapter while traveling from South Africa 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 South Africa are C, M and N. This is how they look like.

South Africa

In South Africa, outlets of type C, M and N are in use.

Type C

Type M

Type N

Vatican City

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

Type C

Type F

Type L