You Do Need power plug adapter while traveling from Palestine 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 Palestine are C and H. This is how they look like.

Palestine

In Palestine, outlets of type C and H are in use.

Type C

Type H

Vatican City

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

Type C

Type F

Type L