The fonds documents Kaplan's work as an architect from the 1930s to the 1960s with Kaplan & Sprachman and some of the consulting work he undertook after the dissolution of the partnership in 1965, primarily through architectural drawings and photographs. The preponderance of the materials relates to a series of renovations of Loew's Yonge Street Theatre (189 Yonge St., Toronto, now the Elgin Theatre) and the Uptown Theatre (764 Yonge St., Toronto, just South of Bloor St.) between the 1930s and 1960s, and Kaplan & Sprachman's design of the Primrose Club (Russell Hill Rd at St. Clair Ave., Toronto) in 1958-1959. There is also a large number of photographs by commercial photographers of movie theatres designed or renovated by Kaplan & Sprachman. Project records are arranged chronologically, with sub-sub-series defined for successive projects at the same site. Some of the materials document project proposals which were not carried out (e.g., proposed renovations of the Winter Garden Theatre). Other series in the fonds contain business correspondence and newspaper clippings concerning Kaplan & Sprachman projects, and a small amount of personal material such as family photographs, awards Kaplan received over the years for his design work and a colour photocopy of the invitation to Kaplan's stag party in 1923. Fonds is comprised of the following series: Architectural projects Newspaper clippings on Kaplan & Sprachman projects Correspondence with Province of Quebec Association of Architects concerning membership Family photographs and other personal materials