Architectural Archives of the University of Pennsylvania
Contains the works of more than 400 designers from the 18th century to today, most notably the office drawings, models and papers of Louis I. Kahn, located in Philadelphia.
http://www.design.upenn.edu/archives/archives/

Architecture of Wales
Collection of architectural drawings, mostly of Welsh structures, held at The National Library of Wales.
http://www.llgc.org.uk/ardd/pensaeri/architect.htm

Arizona State University Architecture and Environmental Design Archives
Houses archival drawings of nine designers, as well as papers for Litchfield Park and a Solar Energy Collection, in Tempe, Arizona.
http://www.asu.edu/lib/arch/libarchives/scindex.html

Avery Library Drawings and Archives
A collection of 500,000 items, including original drawings, blueprints, photographs, correspondence, and other architectural records at Columbia University, New York.
http://www.columbia.edu/cu/lweb/indiv/avery/

Ball State University
The College of Architecture and Planning’s Drawings and Documents Archive preserves and makes available records concerning Indiana’s historic sites and structures and the careers of Hoosier designers.
http://www.bsu.edu/cap/facilities/archives/

Barragan Foundation
This foundation in Switzerland houses the professional archives of Luis Barragán.
http://www.barragan-foundation.org/

Canadian Centre for Architecture
A museum and study centre devoted to international architecture past and present. The collection includes 42,000 prints and drawings from the late 15th century to the present and 50,000 architectural photographs. French and English language options.
http://cca.qc.ca/

Carnegie Mellon Architecture Archives
Aims to document the architects and architecture of Pittsburgh and the tri-state region of western Pennsylvania, eastern Ohio and northern West Virginia.
http://www.library.cmu.edu/Research/ArchArch/

Environmental Design Archives
A repository of historical architecture and landscape architecture records at the College of Environmental Design, University of California. Collections, programs and services.
http://www.ced.berkeley.edu/cedarchives/

Gottscho-Schleisner Collection
Photographs by Samuel Gottscho and William Schleisner in the Library of Congress of the architecture and interior design of 20th-century America. Can be browsed or searched.
http://memory.loc.gov/ammem/collections/gottscho/

Irish Architectural Archive
The archive was established in 1976 to collect, preserve and make available to the public records of every kind relating to the architecture of Ireland.
http://www.iarc.ie/

Lambeth Palace Library
Includes the archive of the Incorporated Church Building Society (1818-1984), the single largest source of plans and drawings of new and rebuilt churches in the UK. Library holdings, services, news.
http://www.lambethpalacelibrary.org/

Research Materials for Architecture in Metropolitan Washington
This directory by the University of Maryland Libraries describes collections of architectural drawings, photographs and papers in various archives, libraries and other repositories.
http://www.lib.umd.edu/Guests/DCARCHres/

Royal Institute of British Architects: Library, Drawings and Archives
Descriptions and online catalogue of the collections including over 650,000 architectural drawings by mainly British architects, over 700,000 manuscripts and archives and more than 650,000 photographs of architecture worldwide.
http://www.architecture.com/Library%20drawings%20and%20photographs/Home.aspx

The Muzharul Islam Archive
Maintains and catalogs the drawings and related materials of noted Bangladeshi architect Muzharul Islam. It is hosted by the University of Asia Pacific. Biography and photographs.
http://www.muzharulislam.com

The National Monuments Record
Public archive of English Heritage.Photographs, architectural and archaeological reports, plans and items related to the historic environment of England.
http://www.english-heritage.org.uk/nmr