“I am a firm believer in the well-lived room,” states New York City interior designer Robert Couturier, who decorated Manoir Barquet, his former 18th-century estate in the Normandy region of France, in a style he calls “French-country easy comfort and elegance.” The antiques-loving Couturier was determined not to make the room a time capsule, so a late-19th-century Oushak carpet from 1stDibs sets the stage for deft modern touches: a 1920s armchair by André Groult, along with matching 1940s shagreen coffee tables and Jansen sofas in a somewhat psychedelic Brunschwig & Fils flame-stitch fabric. These are balanced by period-appropriate choices that include a lattice-back Directoire chair made for the Château de Fontainebleau and sourced from Jacob Frères, 17th-century Italian embroidered panels fashioned into a folding screen and an 18th-century tilt-top gueridon by Joseph Canabas. “Everything was very carefully chosen and curated,” Couturier says of his approach. “Even though everything should look as if it was thrown together without much attention.”