The time-honored tradition of window shopping truly comes alive during the holiday season, when retailers pull out all of the stops to make their window displays ever more eye-catching, festive and uplifting. Countless visitors and New Yorkers alike participate in this yearly ritual, which has its roots in the Gilded Age. That era of rapid economic growth and industrialization, which began in the 1870s and lasted until around 1900, generated the building technology that made window shopping in the city possible.

In the closing decades of the 19th century, New York underwent a profound physical and cultural transformation. Fueled by the wealth of the exploding financial and manufacturing sectors, the city rapidly evolved into a world-class metropolis. The bold ambitions of civic and business leaders, architects, and engineers of the era manifested in landmarks such as the vast Cathedral of St. John the Divine, the stately U.S. Custom House, the towering Municipal Building, and the original terminus of New York City’s first official subway line—the ornate City Hall stop. The sweeping interior spaces common to all of these structures, and hundreds of others, depended upon a venerable Mediterranean building technology adapted to contemporary American construction: arched tile ceilings—or vaults—that were not only self-supporting but could also bear the weight of floors or roofs above them. These vaults were designed and built by a single New York firm, founded by Spanish immigrant Rafael Guastavino (1842-1908) and later headed by his son Rafael Jr. (1872-1950). The Guastavinos’ patented system for building domes and vaults involved multiple layers of thin ceramic tiles bonded with quick-drying mortar. The resulting structures were not only exceptionally strong, but also lightweight, easy to build, and inherently beautiful, thanks to intricate patterns of exposed tile that formed finished, decorative surfaces. Guastavino vaults figured prominently in more than 1,000 projects across the nation, including 200 in Manhattan alone. During its 73-year history, the Guastavino Company helped build some of the most impressive interior spaces in America—veritable palaces for the people. This list based on MCNY's exhibition Palaces for the People, contains many of Guastavino's masterpieces in the five boroughs, both those that remain and those that have been lost to the wrecking ball.

Lord & Taylor Building ARCHITECT: Starrett & Van Vleck DATE: 1913-14 STYLE: Italian Renaissance Revival The Lord & Taylor Building’s Italian Renaissance Revival design began the trend toward more evidently commercial appearances for retail buildings in the Fifth Avenue shopping district above 34th Street. The building and its site wrap around what was historically a separate parcel at the corner of Fifth Avenue and West 39th Street; the ten-story building with its main façade on Fifth Avenue and two developed facades on West 38th and 39th Streets owes its dignified sense of scale to the subtle treatment of its tripartite façade consisting of a two-story limestone and granite base with elegant double-height, vaulted Fifth Avenue entrance and two stories of display windows, a six-story center section of subtly modulated gray face-brick with terra-cotta and patterned brick detailing and multi-light windows, and a two-story limestone colonnade in the Corinthian order supporting a deep copper cornice.

In the Gilded Age, this was the area where America went to shop. If today, New York's iconic shopping district is midtown Manhattan, in the 1880s and 1890s it was Ladies' Mile, the area extending between 15th and 24th streets from Broadway to Sixth Avenue. As a popular guidebook noted in 1892: "Ill fares the rural or provincial purse whose owner ventures before these attractive windows, extending for miles on miles, ever diversified and varied." Indeed between just 19th and 22nd streets on Broadway you could purchase a French velvet or antique Oriental rug at the carpet emporium, W. & J. Sloane (now ABC Carpet & Home); a silver punch bowl carved with twisted vine handles and lion paw feet at the silver maker Gotham Manufacturing Company; and a bespoke or ready-made suit at Brooks Brothers.