This collection of documents—roughly 3,800 pages of court proceedings—concerns the Haymarket Affair. This watershed event in the history of American radicalism led to the first "Red Scare" in America. Materials include autobiographies of two of the eight anarchists tried for conspiracy in the murder of seven Chicago police officers. The officers died after a bomb exploded at an anarchist meeting in May 1886, the day after two workers died in a struggle between police and locked-out union members at the McCormick Reaper factory. Four defendants were executed, despite lack of evidence connecting them to the bombing. The site presents approximately 221 newspaper clippings, 55 photographs, 19 letters, nine broadsides, and images of more than 20 artifacts. A linked exhibition, "The Dramas of Haymarket," furnishes a historical narrative and contextual interpretation. This website is valuable for the study of late 19th-century American radicalism, law enforcement, and political climate.

Focusing on the experiences of Africans and African Americans in New York City, this collection presents nine galleries that explore various themes and time periods in the history of slavery. These include the Atlantic slave trade; slavery in Dutch New York; the growth of slavery in British Colonial New York; freedom for blacks during the Revolutionary War; the Gradual Emancipation Act of 1799; free blacks in public life; Emancipation Day (July 4, 1827), and the history of scholarship on slavery in New York City. Each gallery has three panels: a gallery overview, a main thematic presentation, and one focusing on people, places, and documents. Of special interest are two interactive maps with timelines in the Dutch New York gallery and the Revolutionary War gallery; a picture gallery on the portrayal of blacks in New York City's public life; and profiles of nine African Americans who lived in New York City during the early republic.

Nearly 4,000 panoramic photographs of cityscapes, landscapes, and group portraits, deposited as copyright submissions by more than 400 companies, are displayed on this site. Panoramic photographs were used to advertise real estate and to document groups, events, and gatherings. Images depict all 50 states, the District of Columbia, and more than 20 foreign countries and territories. Subjects include cityscapes, landscapes, group portraits, agricultural life, disasters, education, engineering, fairs and expositions, industrial scenes, military activities, performing arts, sports, and transportation. Although the images cover the period from 1851 to 1991, the collection centers on the early 20th century. The site includes a bibliography, an illustrated 1,000-word background essay on the history of panoramic photography, and an essay outlining the technicality of shooting a panoramic photograph. Four essays focus on specific photographers: George R. Lawrence (1869–1938); George N. Barnard (1819–1902); Frederick W. Brehm (1871–1950); and Miles F. Weaver (1879–1932).

These varied collections document the history of Los Angeles and southern California. "Digital Archives" offer more than 126,000 photographs, maps, manuscripts, texts, and sound recordings in addition to exhibits. Nearly 1,200 images of artifacts from early Chinese American settlements in Los Angeles and Santa Barbara are available, as is the entire run of El Clamor Publico, the city's main Spanish-language newspaper from the 1850s. Photographs document Japanese American relocation during World War II and photographs, documents, and oral history audio files record Korean-American history. The archive also includes Works Projects Administration Land Use survey maps and Auto Club materials. A related exhibit, "Los Angeles: Past, Present, and Future", offers collections on additional topics, including discovery and settlement, California missions, electric power, "murders, crimes, and scandals," city neighborhoods, cemeteries, Disneyland, African American gangs, and the Red Car lines.

More than 55,000 photographs taken by staff photographers of the Chicago Daily News during the first decades of the 20th century are available on this website. Roughly 20 percent of the photos were published in the paper. The Chicago Daily News was an afternoon paper, sold at a cost of one cent for many years, with stories that tried to appeal to the city's large working-class audience.

The website provides subject access to the photographs, which include street scenes, buildings, prominent people, labor violence, political campaigns and conventions, criminals, ethnic groups, workers, children, actors, and disasters. Many photographs of athletes and political leaders are also featured. While most of the images were taken in Chicago and nearby areas, some were taken elsewhere, including at presidential inaugurations. The images provide a glimpse into varied aspects of urban life and document the use of photography by the press during early 20th century.

These 8,000 items document the immigrant experience of Chinese who settled in California during the 19th and early 20th centuries. Materials include photographs, letters, diaries, speeches, business records, legal documents, pamphlets, sheet music, cartoons, and artwork.

Access is provided through nine galleries, each containing an introductory essay and 70 to 575 items. Four galleries present materials on San Francisco's Chinatown, including architectural space, business and politics, community life, and appeal to outsiders. Additional galleries deal with Chinese involvement in U.S. expansion westward; communities outside San Francisco; agricultural, fishing and related industries; the anti-Chinese movement and Chinese exclusion; and sentiments concerning the Chinese. Visitors may search by keyword, name, subject, title, group, and theme. The site will be useful for studying ethnic history, labor history, and the history of the West as well as Chinese-American history.

This well-organized website offers more than 900 items related to Hull House—including newspaper, magazine, and journal articles, letters, memoirs, reports, maps, and photographs. Materials are embedded within a clear historical narrative that illuminates the life of Jane Addams in addition to the history and legacy of Chicago's Hull House.

Users can search the site or focus on any of the 100 topics arranged in 12 chapters that begin with settlement life in Chicago in the 1880s and end with the movement after Addams's death. Topics include the reform climate in Chicago; activism within the movement; the immigrant experience of race, citizenship, and community; education within the settlement house; and cultural and leisure activities at Hull House and in Chicago. The site provides a timeline, featuring a pictorial biography of Addams; a geographical section that includes maps of Chicago; and an image section, with 12 photograph sections and essays.

These 1,275 detailed historical maps depict cities in the state of Utah. D. A. Sanborn Company, a pioneer producer of insurance maps on a national scale, designed maps that depicted commercial, industrial, and residential sections of Utah cities. The collection of large-scale detailed maps dating from 1867 through 1969 is an ongoing project, and currently contains maps of 40 cities. Users may download compressed images to view and enhance the maps. Maps are arranged alphabetically by city and date, although the years available for each city are inconsistent.

The maps outline the site, size, shape, construction, and building materials of dwellings, commercial buildings, and factories. In addition, the maps detail building use, sidewalks, property boundaries, house and block numbers, and even the locations of hydrants and wells. The collection presents an opportunity to study Utah history, architectural history, and the development of cartography.

This exhibit commemorates the 125th anniversary of the Great Chicago Fire (1871) with an array of primary sources arranged into two sections. "The Great Chicago Fire" examines the fire through five chronological chapters, while a second section, "The Web of Memory," focuses on the ways in which the fire has been remembered. This section presents the story through eyewitness accounts, popular illustrations, journal articles, fiction, poetry, and painting. It also examines the legend of Mrs. O'Leary.

The site furnishes galleries of images and artifacts, primary texts, songs, a newsreel, an “Interactive Panorama of Chicago, 1858," and background essays that explore the social and cultural context of the fire and its aftermath.

These 11 exhibits address the history of California and San Francisco. Topics include the Gold Rush of 1849; earthquakes of 1906 and 1989; the history of the city's fire department; construction of the Golden Gate and Bay Bridges; and the internment of Japanese Americans during World War II. These exhibits provide timelines and links to more than 200 primary documents and images, including newspaper articles, diary entries, oral histories, photographs, political cartoons, and engravings. Two exhibits are hyperlinked chronologies pertaining to San Francisco during World War II and the rock music scene in the city from 1965 to 1969.

Documents can be accessed according to subject, with more than 25 documents listed on the Chinese-American community, fairs and expositions, and labor issues. The site also contains more than 150 biographies of prominent San Franciscans.