R. H. Robertson

During his New York partnership with William Appleton Potter, from 1875 to 1881, the firm produced summer vacation cottages in Newport, Rhode Island, and the Jersey Shore, beginning with the Bryce Gray residence in Long Branch c.1877, now demolished.[4] Potter and Robertson also designed:

• South Congregational Church (1871–1875) – Springfield, Massachusetts
• Phillips Presbyterian Church (1873)[6]
• Brown University Library (1875)
• Stuart Hall (1875–77) – Princeton Theological Seminary
• Witherspoon Hall (1875–77) – Princeton University
• Brown University Library (1875) – Providence, Rhode Island
• University Hotel (1875–77) – Princeton, New Jersey, demolished[7]
• Grace Church Chapel (1876) – East 14th Street; the third chapel for Grace Church, and the second on this site, replacing one that burned down in 1872; demolished.[8]
• Alpha Kappa Lodge (1876) – Williams College, Williamstown, Massachusetts.[9]
• St. Augustine's Episcopal Church and Mission House (1876–77) – 107 East Houston Street[10]
• Commodore Charles H. Baldwin House (1877–78) – Newport, Rhode Island; a multi-gabled essay in the Queen Anne style showing the influence of Norman Shaw,[11] and H. H. Richardson's Newport residence for William Watts Sherman (1874–76).[4]
• "Hillside", also known as the Adam-Derby House (1878) – Oyster Bay, New York, for Sarah Sampson Adam. The partnership's only documented house on the Long Island Gold Coast is also in the Queen Anne style.[12]
• Christ Episcopal Church (1878) – Oyster Bay, Long Island; altered by Delano & Aldrich in 1925, who encased the domestic-looking church in stone.[13]
• St. James Protestant Episcopal Chapel, known as the Church of the Presidents (1879) – Long Branch, New Jersey

Robertson's Park Row Building (1899) at 15 Park Row, built for August Belmont, was, for a brief period, the world's tallest office building.[14] Among his many other commissions in New York City and elsewhere:[15]

• St. James Episcopal Church (1881) – East 71st Street & Madison Avenue. Altered by Ralph Adams Cram and others. Collapsed tower replaced by a spire, 1950.[16]
• Church of the Holy Spirit (1881–83) – 775 Madison Avenue, demolished 1905[17]
• Madison Avenue Presbyterian Church (1881–84) – East 60th Street & Madison Avenue, demolished[18]
• 23 East 67th Street (1882–83) – Redesigned in the neo-Federal style and an additional storey added by Sterner and Wolfe in 1919.[19]
• Mott Haven (138th Street) Railroad Station (1885–86) – demolished
• YWCA Building (1885–87) – 7-11 East 15th Street. Now used by the Soka Gakkai International-USA Cultural Center, the Buddhist Association for Peace, Culture and Education.
• Drew Theological Seminary Library (1886) – Madison, New Jersey. Published in The American Architect and Building News 20 March 1886.[20]
• "Sunnymede", Dr. Francis H. Markoe house (1886–87) – Southampton, Long Island. Dr Markoe was Robertson's brother-in-law.[21]
• Knox Presbyterian Church (1887) – 252 East 72nd Street, now known as St. John the Martyr Roman Catholic Church (Manhattan)[22][23]
• Bushnell House (1887–88) – 838 East High Street, Springfield, Ohio. Built for Asa Bushnell and his wife Ellen, and now a funeral home, the Bushnell House exemplifies Robertson's Richardsonian Romanesque style.[24] It is part of Springfield's East High Street Historic District,[25] which is listed on the National Register of Historic Places.[26]
• "Wyndcote", Robertson's residence (1887–88) – Southampton, Long Island.[21]
• Phelps Stokes-J.P. Morgan, Jr. House (1888) – 231 Madison Avenue; Robertson significantly enlarged this Italianate mansion, which was originally built in 1852-53. A New York City landmark.[27]
• Christ Church (1887–89) – Poughkeepsie, New York
• "Hammersmith Farm" (1887–89) – Newport, Rhode Island, for John W. Auchincloss
• Jan Hus Bohemian Brethren Church (1888) – 347 East 74 Street[28]
• Rutgers Presbyterian Church Chapel (1888) – West 73rd Street; named after the same man, Col. Henry Rutgers, as Rutgers University[29]
• Margaret Louisa Home (1889–91) – 14-16 East 16th Street
• St. Luke's Episcopal Church (1889–90) – 73 South Fullerton Avenue, Montclair, New Jersey[30]
• 13 East 71st Street (1891–92) – town house[16]
• Church of the Messiah and Incarnation (1892) – Greene Avenue, Brooklyn. Completed the design of James H. Giles.[31]
• St Luke's Church (1892) – Convent Avenue, Hamilton Heights (Manhattan)[32] Within the Hamilton Heights Historic District,[33]
• Pequot Library (1893) – Southport, Connecticut. Meticulously restored in 2008.[34]
• American Tract Society Building (1894–95) – 150 Nassau Street[35] Combining elements of Renaissance Revival and Romanesque Revival styles, this is one of the earliest steel-framed structures; it is clad in gray Westerly granite, gray Roman brick and tan architectural terracotta.[36] A New York City landmark.[37]
• Engine Company 55 Firehouse (1895) – Fire Department of New York[38]), 363 Broome Street, Manhattan.[39] A New York City landmark.[40]
• New York Savings Bank (1896–97) – Eighth Avenue at West 14th Street (northwest corner). The grand Roman banking hall was occupied by Central Carpet, then by the upscale grocery mart, Balducci's (2005-2009).[41] It and its twin across the street[42] serve as New York's gemelli churches. A New York City landmark.[43]
• Academy of Medicine (1889) – 17 West 43rd Street, demolished
• Rutgers Riverside Presbyterian Church (1889–90) – Broadway and West 73rd Street, demolished and replaced with the present structure
• Lincoln Building (1889–90) – 1-3 Union Square West. A New York City landmark.[44]
• MacIntyre Building (1890–92) – 874 Broadway, lofts, the AIA Guide to New York City (4th ed.) calls refers to the building's style as "unspeakable eclectic"[1]
• United Charities Building (1891–1892) – East 22nd Street and Park Avenue South, designed with Rowe & Baker
• Mohawk Building (1891–92) – 160 Fifth Avenue[45]
• Mendelssohn Hall (1891–92) – for the Mendelssohn Glee Club[46]
• Church of St Paul and Parish House (1895–97) – 540 West End Avenue at West 86th Street. Tuscan Renaissance in tan brick and limestone, with an octagonal campanile at the corner. The AIA Guide to New York City (4th ed.) calls this church, with its octagonal corner tower, "a startling work." It's now the Church of St. Paul and St. Andrew and is shared with Congregation B'nai Jeshurun.[47] A New York City landmark.[48]
• First Reformed Dutch Church (1896–1897) – Somerville, New Jersey
• Fourth Universalist Society in the City of New York (1898) – Central Park West and 76th Street. Mosaic in interior.
• Moses Allen and Alice Dunning Starr House (1897–99) – 5 West 54th Street; a New York City landmark.[49]
• Bedford Park Presbyterian Church (1900) – Bedford Park Boulevard, the Bronx[50]
• Lying-in Hospital (1902) – 305 Second Avenue between East 17th and 18th Streets, now "Rutherford Place", apartments and offices[51]
• Corn Exchange Bank Building
• Shelburne Farms – Shelburne, Vermont. Shelburne House, the Breeding Barn, the Farm Barn and the Coach Barn make up Robertson's most ambitious farm complex. Robertson designed the adjacent Shelburne Railroad Station (1890).[52]
• Camp Santanoni Main Camp Complex – Newcomb, New York; for Robert C. Pruyn of Albany, a Yale classmate of Robertson's. The first Adirondack camp to be comprehensively designed as a unit by a professional architect.[53]

In 1902 Robertson took in as partner Robert Burnside Potter, nephew of William Potter. They designed a cottage, perhaps several, for Regis H. Post in Bayside, Long Island.[4]

• Hugh D. Auchincloss House (1903) – 33 East 67th Street[54]
• House of Relief Ambulance Annex (1907–08) – 9 Jay Street, was attached by an enclosed overhead bridge to the House of Relief, New York Hospital across Staple Street; within the Tribeca Historic District.[55][56]