European elections: Italy's Five Star Movement rails against EU
22 May 2014 Last updated at 16:15 BST
Politician and comedian Beppe Grillo leads an anti-establishment group known as the Five Star Movement.
It became a force in Italian politics at the last general election when it took 25% of the vote and stormed into Parliament in Rome.
As Alan Johnston explains, the activists are now turning their wrath on Euroland.