You Do Need power plug adapter while traveling from Vatican City to South Africa.

Here is Why You Need An Adapter

The outlet and plug type used in South Africa are C, M and N and in Vatican City are C, F and L. This is how they look like.

Vatican City

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

Type C

Type F

Type L

South Africa

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

Type C

Type M

Type N