107 East 70th Street, date unknown (post 1921). This five-story building with stone trim was constructed in 1921-22 for Thomas Lamont, a principal at J.P. Morgan & Co. Inc. The architects Walker and Gillette were known for two types of structures: New York City townhouses and suburban mansions. This Tudor Revival style home features stone projected bay windows, a portico with Tuscan columns, large leaded-glass windows, and series of Tudor style chimneys. The architects also set the home back from the building ten feet, and did not build all the way to the lot line on the west side, creating a side garden hidden by a street wall. In 1954 the building was retrofitted for the offices of the Visiting Nurse Service of New York (upon donation of the home by the widow of Mr. Lamont). The organization still occupies the building, which underwent a massive interior renovation in 2009 by the preservation focused firm of Beyer Blinder Belle.

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.