You Do Need power plug adapter while traveling from Canary Islands 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 Canary Islands are C, E and F. This is how they look like.

Canary Islands

In Canary Islands, outlets of type C, E and F are in use.

Type C

Type E

Type F

Vatican City

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

Type C

Type F

Type L