From a 15th-century Roman villa to a redbrick neo-Georgian mansion in London, the U.S. government owns some of the most valuable houses in the world. In fact, the State Department has a portfolio of 174 residences. In Rome, the American government’s Villa Taverna sits on seven acres in one of Rome’s most exclusive neighborhoods. It includes a Roman sarcophagus dating to the third century, ancient Egyptian granite columns, a swimming pool and a tennis court, … [more]