You Do Need power plug adapter while traveling from Saint Kitts and Nevis to Italy.

Here is Why You Need An Adapter

The outlet and plug type used in Italy are C, F and L and in Saint Kitts and Nevis are D and G. This is how they look like.

Saint Kitts and Nevis

In Saint Kitts and Nevis, outlets of type D and G are in use.

Type D

Type G

Italy

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

Type C

Type F

Type L