At the end of a cobbled courtyard stands the unexpected. Here, near the Invalides, the regal 18th-century realm commissioned for the brother of King Louis XVI rekindles the days—and glittering nights—when owners Cole Porter and Linda Lee hosted luminaries such as F. Scott Fitzgerald and Ernest Hemingway amid platinum-clad walls and zebra-skin sofas. A rhapsody of soft seduction, it begins at a grand staircase introducing some 8,600 square feet on two splendorous levels that feast on glorious gardens. A highlight of the nine bedrooms is a master suite with private living room, study, and fitness room. Inspiring guests as it has for centuries, and as it did Cole Porter—who wrote “Night and Day” and “Anything Goes” during this period—it epitomizes the incandescent splendor of Paris.