Poet Henry Wadsworth Longfellow stayed in lodgings on the site of this hotel, on what is now one of Florence’s most prestigious square. I doubt the service he experienced was anywhere near the international corporate standards set here. The quietly stylish rooms were mostly revamped in 2016, with cream tones, natural wood, tan leather, and travertine bathrooms. Each one is well soundproofed against neighbors and outdoor noise. A major bonus from May to September: a rooftop pool with panoramic sundeck, bar, and evening aperitivo buffet.