Tiffany & Co. is the only major luxury jewelry house that was founded in New York and has remained centered in New York throughout its entire history. Charles Lewis Tiffany opened his first store on Broadway in 1837 — a stationery and fancy goods shop that evolved, over decades, into the most recognized fine jewelry brand in the United States. His son Louis Comfort Tiffany brought the Art Nouveau movement into American decorative arts through the stained-glass windows and lamps that now bear his name in museum collections worldwide. The house invented, in 1886, the engagement ring setting that the entire bridal jewelry industry has operated around for a century and a half — the Tiffany Setting: a six-prong platinum mounting that lifts the diamond away from the hand, maximizing its exposure to light from every direction. Before 1886, engagement rings typically featured diamonds set flat against a band. After 1886, they were transformed. That single design decision shaped how the world thinks about diamonds.

The Blue Box — Tiffany Blue, Pantone 1837 — was named for the year of the house's founding and has been the house's most powerful visual communication since the 19th century. The box is never sold. It can only be received — as the container of a Tiffany purchase, as a gift, as a declaration. The color is trademarked. No one else may use it.

The Tiffany & Co. flagship at 727 Fifth Avenue has occupied its current address since 1940 — the building designed by Cross & Cross in a "conservative modern" limestone and granite style that has made it one of the most recognizable retail facades in the world. The nine-foot Atlas statue, shouldering a four-foot clock, has stood above the revolving doors since the 19th century. In 2019, LVMH began a complete renovation of the building — the first holistic intervention since its 1940 opening. The renovation cost an estimated 250 million dollars and required four years. It reopened on April 28, 2023, as The Landmark.

The interior was redesigned by Peter Marino across ten floors. OMA — led by Shohei Shigematsu — designed a three-story glass addition to the top of the building: a "diamond on the roof," a blue box floating above the limestone, lit at night in Tiffany Blue. The staircase running from the ground floor to the seventh was inspired by Elsa Peretti's love of organic forms — ceruse oak with transparent balustrades set with rock crystal and infinity mirrors. Nearly sixty works of art are integrated throughout the ten floors: Jean-Michel Basquiat's Equals Pi on the ground floor, a color-changing oval by James Turrell, mirrored disks by Anish Kapoor, a Claude Lalanne apple on the eighth floor alluding to New York's nickname. It is, at 110,000 square feet, the largest jewelry store in the world and the largest single-brand luxury boutique on earth.

If Jean Schlumberger gave Tiffany its fantasy register, Elsa Peretti gave it its body. The Italian designer joined Tiffany in 1974 and spent five decades producing jewelry of extraordinary formal intelligence — designs organized around the contours of the human body rather than the conventions of the jeweler's bench. The Bean pendant. The Bone cuff. The Open Heart. The Scorpion. Each piece derives its form from something organic — the smooth curve of a kidney bean, the architecture of bone, the asymmetry of a living creature. Peretti's conviction was that jewelry should feel as natural on the body as the body itself. The spiral staircase of The Landmark, inspired by her love of organic forms, is the building's most direct tribute to her influence on the house she served for half a century.

The Landmark sits on the corner of Fifth Avenue and 57th Street — directly across from the Chanel fine jewelry boutique at the Crown Building, in the most concentrated luxury jewelry block in the world. The Atlas clock above the revolving doors has been watching the intersection since the 19th century. The store is set to 72 degrees Fahrenheit throughout the year — a detail specified in the renovation brief as part of the comfort standard. LEED Gold and WELL Platinum certifications were achieved during the renovation. The building is not just a store. It is, in the words of CEO Anthony Ledru, "the lighthouse of the brand" — the point from which every other Tiffany address takes its orientation. For 186 years, that point has been in New York. It has not moved. It will not move.