On the dining room wall, a scrawl in neon lights proclaims, “Hic Manebimus Optime” or “here we’ll stay excellently”, and a truer word has never been written. Behind its seventeenth-century façade, this apartment is an eclectic and intriguing mix of interior styles and a level of comfort to rival that of any hotel. A grand living space with pistachio and fuchsia tones gives way to polished chrome and glass; follow the floating stairs down to your very own wellness facility complete with whirlpool and Hammam—your host can arrange an at-home massage if you’re still in need of a pick me up. Then there’s the outside space, an apricot-hued oasis where al fresco breakfasts and late-night cocktails need no persuasion. Just...