Alexander McMillan Welch (1869-1943) was a New York City based architect who practiced independently and as a member of Welch, Smith & Provot. His firm was best known for designing New York City townhouses in the Beaux-Arts style. The collection includes 1,641 architectural drawings, 196 student drawings, 14 student notebooks, 99 loose photographs and 3 photo albums of project photography, project specifications and files, and some professional ephemera.

Three sketchbooks; the first, 1893-1894, containing sketches from his student years at the Columbia School of Mines, Department of Architecture (he received his degree in 1894); the second, 1894-1896, containing sketches made as a student at the Ecole des Beaux-Arts in Paris; and the third, circa 1896-circa 1905, containing sketches for a variety of projects and designs. Buildings and other structures depicted include the Academy of Music on 14th Street, New York City (a seating plan); Wells Fargo Bank Building, Portland, Oregon, 1910; Reunion Hall, Princeton University, 1902; lantern for the Aetna Building, Hartford, Connecticut; Woodland Street entrance to Kinney Park, Hartford, Connecticut, 1905 (some drawings are by others). Program notes from the classes of Paul Blondel and J. Gaudet at the Ecole des Beaux Arts are included. Also, designs (some done in partnership with Joseph Urban) for proposals for the Metropolitan Opera Company on various sites in New York City, circa 1920s; and designs for shopping and music centers in New York City, to 1936.

This collection contains architectural drawings, photographs, business records and reference materials related to the projects and designs of Bertram Grosvenor Goodhue and his successor firm, Mayers, Murray & Philips, primarily in the New York City region. A large portion of the collection consists of personal and professional correspondence to and from Goodhue from the early 1900s until his death in 1926. Relatively few architectural drawings from his professional practice survive.

The collection includes mostly drawings for Tudor's furniture designs and are arranged by drawing number. Notable projects include the design of the Interchemical Corporation offices, in collaboration with Robert Meyer, as well as the Vanadium Corporation of America offices. The collection also includes 9 sketchbooks. Sketchbooks #1-7 and #9 consist of drawings made by Tudor while likely an apprentice. Sketchbook #8 contains drawings made while working for White, Allom & Co. Notable clients include "Dr. A", "R.G.L." The scrapbook contains clippings and photographs presumably from his professional practice as some of the photographs are labeled "E.J. Tudor." Notable projects include the Rolling Rock Club (Pennsylvania), Dixon House (unknown location), Hampton Court (England), Whitemarsh Hall (England), Mellon Institute (Pittsburgh) and Henry C. Frick (New York). Other papers include correspondence related to the design of the Interchemical Corporation offices, collected print material, 21 photo negatives depicting various travel sites and 13 color charts arranged by manufacturer. The collection also contains lantern slides, which were used by Tudor to teach interior design at New York University. The slides show architectural views and details particularly English, French and American designs as well as interior views, details and furniture.

This collections includes architectural drawings, files and photographs of projects designed by Woodbridge and his various firms, circa 1928-1960s. These include buildings at Presbyterian Church, Savoonga, St. Lawrence Island, Ala.; Cole Memorial Chapel, Wheaton College, Wheaton, IL; Amherst College, Mass.; Smith College, Mass.; St. Mary the Virgin Church, Chappaqua, N.Y.; St. John's Chapel and Library, Hobart College, Geneva, N.Y.; the Keene Valley Congregational Church, Keene Valley, N.Y.; and the Brick Presbyterian Church and the Episcopal Church Center, both in New York City; as well as other churches, residences, and miscellaneous projects. Also, included are drawings done by Woodbridge while a student at the Columbia School of Architecture, early 1920s; photographs of some of Woodbridge's buildings taken mostly by the architectural photographer Samuel H. Gottscho; a small sample of Woodbridge's correspondence, 1941-1942, documenting his role as chairman of the American Institute of Architects Committee on Architectural Services, relating to the role architects could play in the war effort; sketchbooks of various international locations; and photographs and documents relating to archaeological excavations at Antioch in Pisidia, Turkey.

Sketchbooks, 1895-1903; sketches, 1894-1896, made while Magonigle was travelling in Europe on Rotch Travelling Scholarship; graphic designs, 1902-1919; rendered competition drawings for government buildings, circa 1907-1920, and memorial structures, circa 1910-1930; photographs of Magonigle's architectural drawings, memorial structures, monuments, and other architectural work, much of it located in New York City, circa 1900s-1930s. Among projects represented in the collection are the Gates Avenue Courthouse, Brooklyn, N.Y.; the Firemen's Memorial, the Robert Fulller Memorial, and the National Watergate Memorial in New York City's Riverside Park; the Liberty Memorial in Kansas City, Mo.; the Isaac Guggenheim house in Port Washington, N.Y.; numerous additions and alterations for the Franklin Murphy mansion in Mendham, N.J.; and the United States Embassy compound in Tokyo, Japan. Also, drawings by other architects including Hugh Ferriss, Thomas Rogers Kimball, Hubert George Ripley, and I.W. Taber, that were presented to Magonigle. Also included are drawings, circa 1910s-1940s, by Magonigle's wife, painter and designer Edith Marion Day; photographs of Day and Magonigle; manuscripts of lectures, literary works, and other writings by Magonigle; and ephemera.

Included are drawings made by Avery while studying under Jules Andre at the Ecole des Beaux-Arts, Paris, and sketchbooks containing sketches made in Paris and on excursions, 1872-1879. Architectural drawings and photographs of architectural drawings for proposed or executed residential and commercial buildings, churches, art galleries, monuments, and other structures, 1880s; competition drawings for public monuments, 1883-1887; experimental studies, 1885, for the pedestal of Frederic-Auguste Bartholdi's Statue of Liberty; and 39 studies and finished drawings, 1888-1890, made for a competition for a memorial for Ulysses S. Grant which he did not win. Also, magazine articles by or about Avery and his work, 1883-1890; obituaries and death announcements, 1890; miscellaneous photographs, certificates, and papers; and invitations, clippings, illustrations, and photographs, circa 1892-1894, relating to the founding of the Avery Architectural Library at Columbia University.

This small collection contains primarily photographs, supplemented by a very few architectural drawings, specifications, and reference materials related to the projects and designs of Bertram Grosvenor Goodhue and his successor firm, Mayers, Murray & Philips, in the New York City region and in other locations in the United States. It also includes reference materials and a photograph of Betram Goodhue's New York City office.

This collection contains professional and personal writings, published papers, correspondence, photographs, architectural records, student work, and research materials related to the academic and architectural practice of Talbot Faulkner Hamlin.

Also, minutes kept by Richard Michell Upjohn for the American Institute of Architects, New York Chapter, Committee for Library and Publications, 1868-1877, and Executive Committee, 1867-1889; sketchbooks, 1850s-1870s; photographs of Upjohn buildings and portraits of Richard Upjohn; correspondence, wills, memorial tributes, manuscripts, printed material, and miscellaneous personal and business documents; and several drawings by other architects including Alexander Jackson Davis, Hobart Brown Upjohn, and Calvert Vaux