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.

Architectural drawings and photographs of buildings designed by the firm dating approximately from its founding to the 1950s. Among those represented are buildings at the World's Columbian Exhibition, Chicago, 1893; Pennsylvania Railroad Station, New York, 1906-1910; restoration, 1903, of the White House, Washington, D.C.; buildings at Columbia University's Morningside Heights campus, New York; Boston Public Library, Boston, Mass.; E.W. Morgan mansion; Municipal Building, N.Y.; Col. Elliott Shepherd House, Scarborough, N.Y.; buildings at Amherst College, Amherst, Mass.; Bellevue Hospital, New York; various New York City residences; and others. Also included are competition drawings for the New York Public Library; miscellaneous drawings and sketches; photographs of the partners and of other members of the firm; lists of the firm's work; clippings of articles about the firm; lists of the firm's employees; billing records, 1953-1955; account books, 1940s-1950s; bank books, 1895-1955; award certificates; and other office miscellany.