Volterra Fietta is the only dedicated public international law firm in the world. It offers both state and corporate clients a unique blend of expertise and practical experience in all aspects of public international law, including international arbitration. Volterra Fietta represents clients in the international courts and in some of the most high-profile investment treaty arbitrations to date. Volterra Fietta is named as the sole law firm in the first tier of rankings in the practice of public international law in the 2015 edition of the Chambers and Partners legal directory, which notes that the firm is ‘sought out for its exceptional counsel on both the contentious and advisory sides’ and ‘(a)cts for prominent clients across the full spectrum of PIL matters, from international maritime law and investment treaty arbitrations to economic sanctions and sovereign debt’. The directory added Volterra Fietta to its list of leading international arbitration practices this year, noting that it is an ‘international disputes firm with a specialism in investment and energy charter treaty arbitrations. It counts governments and overseas investors among its clients’. In its most recent report, The American Lawyer ranked Volterra Fietta as one of the top 10 arbitration firms in the world.