Lo's Chinese Food sign, Kingman, Arizona

The John Margolies Roadside America Photograph Archive is one of the most comprehensive documentary studies of vernacular commercial structures along main streets, byways, and highways throughout the United States in the twentieth century. Photographed over a span of forty years (1969-2008) by architectural critic and curator John Margolies (1940-2016), the collection consists of 11,710 color slides (35mm film transparencies). Frequent subjects include restaurants, gas stations, movie theaters, motels, signage, miniature golf courses, and beach and mountain vacation resorts. Approximately half of the slides show sites in California, Florida, Michigan, New Jersey, New York, South Carolina, and Texas, but all 48 contiguous states are represented.The Library of Congress began to acquire portions of the archive in 2007, with the bulk of the materials arriving in 2015. These holdings form the core of what Margolies considered the exemplary images of his subject matter. Margolies' Roadside America work chronicled a period of American history defined by the automobile and the ease of travel it allowed. Emerging with the prosperity of the post-WWII era, roadside and commercial structures spread with the boom of suburbanization and the expansion of paved roads across the United States. Yet, in many instances, the only remaining record of these buildings is on Margolies' film, because tourist architecture was endangered by the expansion of the interstate system and changing travel desires. Margolies' work was influential in the addition of roadside buildings to the National Register of Historic Places beginning in the late 1970s. In his photography, Margolies utilized a straightforward, unsentimental approach that emphasized the form of the buildings. These structures were usually isolated in the frame and photographed head-on or at an oblique angle to provide descriptive details. Given the breadth of his subject matter, common typologies and motifs in vernacular architecture can be identified through their repetition. While environmental context is only occasionally provided, Margolies' eye was often drawn to signage or other graphic elements of buildings that expressed the ingenuity or eccentricity of their makers.

In the 19th century, a majority of Chinese immigrants were single men who worked for a while and returned home. At first, they were attracted to North America by the gold rush in California. A relatively large group of Chinese immigrated to the United States between the start of the California gold rush in 1849 and 1882, before federal law stopped their immigration. After the gold rush, Chinese immigrants worked as agricultural laborers, on railroad construction crews throughout the West, and in low-paying industrial jobs. Soon, many opened their own businesses such as restaurants, laundries, and other personal service concerns. With the onset of hard economic times in the 1870s, European immigrants and Americans began to compete for the jobs traditionally reserved for the Chinese. Such competition was accompanied by anti-Chinese sentiment, riots, and pressure, especially in California, for the exclusion of Chinese immigrants from the United States. The result was the Chinese Exclusion Act, passed by Congress in 1882. This Act virtually ended Chinese immigration for nearly a century.