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.

Architectural plans and renderings of Welch's designs, largely New York City residences, circa 1890s-1920s; specifications; photographs; and brochures advertising buildings at 787 Fifth Ave., 628 Fifth Ave., and 71 and 73 Murray Street, in New York City. Drawings and a sketchbook done by Welch while a student; fourteen notebooks containing Welch's notes from Columbia classes in architecture, 1888-1890; licenses to practice in New York and New Jersey, 1904-1923; a certificate, 1937, and related correspondence relating to Welch's appointment as a U.S. delegate to the fourteenth International Congress of Architects, held in Paris, July 18-25, 1937. A list of U.S. delegates is included. Of note are drawings and papers for the restoration of the Dyckman House, an 18th century farmhouse in upper Manhattan (1910-1917); and the Mrs. Rutherford Stuyvesant Estate in Allamuchy, New Jersey, and the Rutherford Stuyvesant Momument in Tranquility Cemetery, Tranquility, New Jersey, designed by sculptor Daniel Chester French.

Photographs and architectural drawings of Lienau's work, much of it in New York City and in New Jersey. Projects include the Gardner A. Sage Library for the General Theological Seminary in New Brunswick, N.J.; the Francis Cottenet Villa in Dobbs Ferry, N.Y.; a house for Legrand Lockwood in South Norwalk, Conn., later owned by Mark Twain and now known as the Lockwood-Mathews Mansion; and the Telfair Academy of Arts and Sciences in Savannah, Ga. Also included are drawings of unidentified or unexecuted buildings; student drawings, and early European commissions; lecture notes, 1835-1837, from the Stadtische Gewerbeschule, Berlin; a partial list of of Lienau's work, 1848-1886; specifications; acounts; printed material; photographs, postcards, and prints showing various European buildings; clippings; certificates; typescripts of articles; and correspondence.

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.

Harold Van Buren Magonigle was a New York-based architect, graphic designer, painter and sculptor. Magonigle married artist Edith Marion Day in 1900. Edith Magonigle was a painter and muralist who served as President of the Society of Women Painters and Sculptors. Edith was a primary collaborator of Harold Van Buren Magonigle in both the decoration and creation of buildings designed by his practice. He was widely known as an architect of memorial structures including the Firemen's Memorial on Riverside Drive and the Liberty Memorial in Kansas City. Other prominent commissions include the Isaac Guggenheim house in Port Washington, New York and the United States Embassy in Tokyo, Japan.

Hugh Ferriss (1889-1962) was an architectural renderer known for his vision of the modern city and his ability to translate vast projects into dramatic but clear-cut images. Ferriss published two books: The Metropolis of Tomorrow (1929) and Power of Buildings (1953). The collection was donated to Avery Library by Ferriss' family after his death, and has been supplemented by several later additions from other sources. 363 original drawings in the collection have been photographed and digitized and can be viewed via links in the finding aid's container listing.

Also, typescripts of lectures delivered by Boring in architecture courses at Columbia, 1932-1933, miscellaneous typescripts of articles and printed materials, 1930-1933, and a typescript of Boring's autobiography, MEMORIES OF THE LIFE AND WORK OF WILLIAM A. BORING, circa 1937. Also included are four sketches by Henri Gauthier, Edward Tilton, Maurice Sashin, and Joseph Laudin.