You Do Need power plug adapter while traveling from Iraq 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 Iraq are C, D and G. This is how they look like.

Iraq

In Iraq, outlets of type C, D and G are in use.

Type C

Type D

Type G

Vatican City

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

Type C

Type F

Type L