Architectural drawings, specifications, manuscripts, printed materials, photographs, ephemera, collected by Hitchcock, and relating to the work of architects Henry Hobson Richardson and Frank Lloyd Wright, including a letter, 1940, from Wright to Hitchcock suggesting the writing of IN THE NATURE OF MATERIALS; the architectural firm Shepley, Rutan, and Coolidge; furniture designer Charles Rennie Macintosh; and miscellaneous and unidentified architects dating from the sixteenth century to the twentieth century, with the bulk dating from the nineteenth century.

Architectural drawings with miscellaneous photographs, prints, and reproductions executed by Charles Stoughton, or by the architectural firm Stoughton & Stoughton, formed by the partnership of Charles and Arthur Stoughton. Projects include bridge designs for the estates of John D. Rockefeller, Jr. at Mount Desert Island, Maine, 1930-1934, and Pocantico Hills, Tarrytown, N.Y., 1929-1931; buildings at the Canton Christian College at Hong Lok, Canton, China, 1905-1913; a residence for secretaries, Young Women's Christian Association, Pak Hok Tong, Canton, China, 1915; and buildings at the Polytechnic Institute at San German, Puerto Rico, 1918-1937. Also, a plan and elevations of the grounds, with the location of the house, of the Jumel Mansion, New York, n.d.; a general plan of a hospital, 1919; a photograph of the Soldiers and Sailors Monument, New York; and miscellaneous maps of various sections of New York City, undated except for one dated 1796.

Also, biographical manuscripts, illustrations of coats of arms, pedigree, and lists of his drawings and his library, to circa 1900, much of it done by Joseph B. Davis.

Collection includes James Renwick's sketches, 1813, for the layout of Columbia University's second campus on Park Row (there have been four campuses to date: the first on Wall Street, the third on 49th Street and Madison Avenue, and the current campus in Morningside Heights), and a medal awarded him, 1824, by the Franklin Institute, Philadelphia. James Renwick, Jr. is represented by his architectural drawings of St. Patrick's Cathedral, New York, which he designed. Some of the drawings are signed by Bertram Grosvenor Goodhue. Also, published drawings of the Cathedral, 1886; negatives and photographs, circa 1860s, showing the Cathedral under construction; interior and exterior photographs, circa 1930s-1960s, of the Cathedral; and photographs of Grace Church, New York, also designed by James Renwick, Jr. Renwick family correspondence, 1930s, and typescript copies of 19th century Renwick family correspondence relating to family history and genealogy; photographs of James Renwick, Jr; typescript copies of family Bible records, 1792-1863; Renwick coat of arms.

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

This collection contains photographs, printed and typescript papers, and other documents collected by Leslie O. Merrill in the course of his research on Greek Revival architecture in Syracuse, New York and minor historic preservation efforts. The collection also includes files of examples of Greek Revival architecture in other locations in the United States and Europe.

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.

Architectural drawings for buildings designed by Hamlin including proposed alterations for the Charles Dudley Warner House, circa 1885; pumping station Clear Stream (or Clear Stream Station), Long Island, 1886; American Classical School, Athens, Greece, 1886-1888; proposed cottage for Mrs. R. Hoe at Sea Cliff, Long Island, 1887; an addition to Clinton Hall at Blair Presbyterian Academy, Blairstown, New Jersey, circa 1896; Soldier's Monument, Whitinsville, Massachusetts, circa 1904 (Hamlin was the architect and Herman A. MacNeil was the sculptor); and miscellaneous and unidentified structures. Also included are drawings done by Hamlin while a student at the Massachusetts Institute of Technology, 1876-1877; sketches done by Hamlin on travels both in the United States and abroad, 1867-1923; photographs of various unidentified buildings and architectural drawings; manuscripts of "ARCHITECTURAL SHADES AND SHADOWS" with related drawings"History of American Art" (unfinished, in French), circa 1923, and "MODERN ARCHITECTURE AND THE CRITICS" circa 1923. Personal materials included undated photographs of A.D.F. Hamlin; a photograph of an 1835 portrait of Cyrus Hamlin; a volume containing condolences, 1926, on the occasion of A.D.F. Hamlin's death; and a scrapbook"Memoirs of Amherst, Class of '75" containing programs, invitations, clippings, notes, essays, exam questions, steamship passenger lists, and other materials.

This collection contains lectures, notes, photographs, correspondence, and architectural drawings documenting the work of Russell Sturgis, and, secondarily, his son, Lyman Sturgis. The materials were created between 1874 and 1932.

Included are 19 original architectural drawings and photographs and prints of drawings by Withers. Among these are designs for the Van Schaick Free Reading Room (now the Huntington Free Library and Reading Room), Bronx, N.Y.; reredos proposed for the Church of the Transfiguration, New York City; Chapel of the Good Shepherd on Blackwells Island (now Roosevelt Island), N.Y.; a competition design for the Cathedral of St. John the Divine, New York City; St. Thomas Episcopal Church in Hanover, N.H.); and drawings by others, including Sullivan Jones and Rowland Plumbe. This collection also includes manuscript copies of three letters from Withers to his mother written at sea in 1852 and describing his trip to America.