Wales lead Italy 26-9 with 15 minutes to go in Rome.
Jonathan Davies made the most of a lucky bounce to collect a kick through and score after 44 minutes.
With Italian prop Martin Castrogiovanni in the sin bin, Alex Cuthbert ran a fantastic line to touch down in the corner for Wales' second try on the hour mark.
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Professor Roger Scully of Cardiff University analyses the results of the latest Welsh Barometer Poll
Becoming cloudier from the north and west during the evening but some places continuing to see some clear spells
A council in Wales has had to pay more than £8,600 to end a hire contract for a Porsche its former boss used to drive.