File consists of three architectural drawings of the building of the Berlin [Kitchener] Y.M.C.A. at 22 Queen Street North. Includes a side elevation, main and upper floor plans, and details of the locker room.

The Breithaupt Hewetson Clark collection includes family papers the three families named; the Breithaupt family, the Hewetson family, and the Clark family. Made up of over several hundred cubic feet of archives, about 12,000 photographs, several thousand printed items and a large group of "subject and topical files" as well as plans, maps and drawings.

The largest set of family records are those related to the Breithaupt family of what is today Kitchener with the earliest documents being from the period of Liborious Breithaupt's emigration in 1843. A small group of family papers collected by Spencer Clark contains material on the Clark and Alexander families. Other families including the Devitt family of Waterloo and the Davis family of Brampton are also represented in the collection.

Also in the collection are records related to the Guild of All Arts (now the Guild Inn) in Scarborough, Ontario from its inception in 1932 to the 1980s. Founded by Rosa Breithaupt Hewetson Clark and Spencer Clark, the Guild began as a co-operative crafts community, and evolved primarily as a hotel and conference centre. In addition to Guild records, the Breithaupt Hewetson Clark collection holds smaller collections acquired by the Breithaupt family and by Spencer Clark. The personal library of Spencer Clark, which includes many books, periodicals, government documents, and ephemeral items, was donated together with the archival collections, and is particularly strong in the fields of urban planning, architecture, and Canadian art.

Materials created or accumulated by the Reive Family, especially Dr. Wilfred G. Reive and Mabel M. Reive during the moving, purchasing, design, and construction of their family home at 178 Claremont Avenue. Includes invoices and cheques, architectural drawings, and family photographs.

The Jim Guy collection consists of materials accumulated by Jim Guy relating to his family home at 110 John Boulevard in the Westmount region of Waterloo. Includes architectural plans and specifications as well as home movies and slides showing the home and surrounding area.

One proposed plan for a home and 1/4 acre vegetable garden called Kitchener Park, designed by Landscape Architect John H. Melady.

One register book kept by the Ontario Association of Architects for the years 1890-1899. The book lists dues paid by each member of the association as well as money received for exam fees, filing articles, student fees and more. Also includes one item of correspondence from Mills & Hutton, architects asking the secretary for information on rates for architectural work. The register was kept by William R. Gregg.

Collection consists of 82 plans of gravel pits in Ontario. The plans have been collected by Wayne Caston, and he was involved in consulting in many of the projects. The records in this finding aid consist of information taken from an Excel spreadsheet created by Caston with details on each of the plans. A printout of the spreadsheet is also present in the collection. Plans are listed in the order originally provided by the donor on the spreadsheet.

Collection comprises two separate series of items. The first are the architectural drawings that were created for the contests for both the city of Kitchener city hall and municipal buildings. These plans were created by W.H.E. Schmalz and others. The rest of the collection comprises materials created by W.H.E. Schmalz both when he was a student and a professional architect. Includes primarily maps, architectural drawings and art work.