India, Aug. 2 -- America's official embassy in Rome may reside within the grand walls of Palazzo Margherita, but this summer, the real diplomatic action has moved offshore.

As reported by The Economist, US Ambassador to Italy Tilman Fertitta - a Texan billionaire, Republican mega-donor, and owner of the Houston Rockets - has transformed his 117-metre superyacht, the Boardwalk, into a floating hub for American statecraft.

Valued at an estimated $450 million, the vessel features dual helipads, a spa, a putting green, and teak decks.

Throughout the summer marking America's 250th anniversary, Fertitta has sailed the Italian coastline - mooring off Sorrento, Cefalu, Naples, and Venice - hosting lavish receptions where guests toast with comm...