In the first decade of the 21st century, the Haynes Foundation supported Martin Krieger and his collaborators’ photographic and aural documentation of Los Angeles in a series of grants. A portion of that digitized photographic material is included in this collection documenting 800 storefront houses of worship, 225 industrial neighborhoods, and people at work at industrial sites in Los Angeles (including the Port, LAC-USC General Hospital, and many small firms). On his own, Krieger has extensively documented housing, infrastructure (including about 150 Los Angeles Department of Water and Power electrical stations), Boyle Heights, traffic and street life, commercial strips and ethnic markets, and people on transit and bus.

Krieger has categorized most of these materials in the hierarchical topics below.

The physical material is housed in the Regional History Archives of the University of Southern California and numbers tens of thousands of images as well as hundreds of aural recordings.

Martin H. Krieger is Professor of Planning at the University of Southern California's School of Policy, Planning, and Development. He is the author of several books, including Urban Tomographies (University of Pennsylvania Press, 2011) and What's Wrong with Plastic Trees? Artifice and Authenticity in Design (Westport, CT: Praeger Publishers, 2000).