The signature scent of St. Regis Hotels & Resorts is a high-value, custom-blended fragrance called "Caroline's Four Hundred." Created in collaboration with scent designer Carlos Huber, the aroma is inspired by the legendary "Gilded Age" balls hosted by Caroline Astor, the matriarch of the family that founded the original St. Regis New York. The scent features a sophisticated bouquet of American Beauty roses, green stems, white lilies, and quince, underpinned by notes of crisp apple and exotic woods. It is designed to evoke the feeling of a 19th-century ballroom filled with fresh-cut flowers and refined luxury. For guests in 2026, this olfactory "branding" begins the moment you step into the lobby, creating an instant sense of familiarity and high-end residential comfort. You can even purchase the "Caroline's Four Hundred" candle or room spray from the St. Regis boutique, allowing you to bring the high-value "Astor legacy" aroma into your own home as a sensory souvenir of your stay at one of their global properties.