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.

Constructed in 1913, the Biltmore Hotel was the first post-Grand Central Terminal commission for Warren and Wetmore (who had used some seriously underhanded methods to secure Terminal City work)

William Wilgus, New York Central Railroad's largely self-taught chief engineer, was the mastermind behind Grand Central Terminal's innovative engineering technology. With the plan for electrification and the sinking of the railroad tracks below grade, while building the new modern terminal, Wilgus also convinced railroad officials to commercialize the air above the new street-level decking. In leasing the area above the tracks to developers, the Railroad could increase its profits and create a bustling business district that surrounded, supported, and benefited from Grand Central Terminal. Terminal City, as it was called, began to develop even before GCT was complete in 1913. Between 1909 when the Grand Central Post Office opened and the early 1930s when the Depression largely halted construction, the neighborhood boomed with hotels, apartment hotels, private clubs, and office buildings. Many of these structures were designed by Warren & Wetmore, one of the two architectural firms that created Grand Central. Most of the best-known hotels of Terminal City, including the Biltmore, Roosevelt, and the Commodore, were constructed by the mid 1910s, while the office buildings, including the Graybar and New York Central Buildings, were largely completed in the 1920s. This walk does not propose to be a complete list of all Terminal City development. It does not include any post-World War II constructions and it concerns itself ONLY with some of the Terminal City structures that are still extant. Some of the buildings will be easily recognizable, while others, though technically the same structure, bear no resemblance to their former selves. So lace up some comfortable shoes and let's get exploring.

The New York Preservation Archive Project is a not-for-profit organization dedicated to documenting, preserving, and celebrating the history of historic preservation in New York City. The Archive Project is devoted to celebrating neglected narratives of New York historic preservation using the archives that hold these stories. This collection includes a selection of historic sites that became flashpoints of the city's preservation movement(s). For more information, visit: www.nypap.org/phd-category/places/

Biltmore Hotel, 1914. Constructed in 1913, the Biltmore Hotel was the first post-Grand Central Terminal commission for Warren and Wetmore (who had used some seriously underhanded methods to secure Terminal City work). At 26 stories the Terminal's neighbor stood five times as tall, with two imposing wings surrounding a center light court. The terrace at the sixth-floor setback provided guests with a roof garden and occasional ice skating rink. As early as the 1920s the gold clock of the lobby was a well-known and popular meeting spot, for New Yorkers "Meet me under the clock," directed one to the Biltmore. Not only known in popular culture, the hotel was the location of a number of important geo-politcal events. In 1916 the Treaty of the Danish West Indies was signed there, transferring the now U.S. Virgin Islands to America for $25 million in gold. In 1942 the Biltmore Conference was vital in the establishment of Palestine as a Jewish Commonwealth. By the 1980s the once thriving area known as Terminal City was run down and full of aging structures. The Biltmore was closed in 1981 and, though a somewhat perfect candidate for landmark designation, the demolition of the structure began soon thereafter. Shocked preservationists worked to save some of the interiors. The building was not fully razed, but was gutted, taken down to its steel framing, and rebuilt as 335 Madison Avenue. Today the rescued clock and piano live in the lobby of the new building.