Compatibility summary
Your France plug may fit in Vatican City outlets, as both use at least one common plug type.
Plug comparison
France plug types: C E
Vatican City plug types: C F L
Both countries share at least one plug type (C E and C F L), so some plugs may work without an adapter. Check your appliance.
Voltage comparison
France: 230V, 50Hz
Vatican City: 230V, 50Hz
Voltage difference is within a range many devices tolerate; check your appliance label.