When it comes to old-world elegance, the Hassler is unrivalled. It’s long been the hotel of choice for visiting dignitaries, from Ms Audrey Hepburn and her terrier Mr Famous to the Kennedy clan. The service is unimpeachable, as are the interiors (Limoges porcelain, French silk-upholstered walls and several quarries’ worth of marble). Sequester yourself in the 1940s-style bar or dine in the sixth-floor restaurant and enjoy Italian classics with an artful Asian twist (sake-glazed black cod; candied ricotta with black sesame and cherries).