The Community of the Sisters of Charity, an order of the Congregation of the Mission founded by St. Vincent De Paul and dedicated to teaching and nursing, was founded in the U.S. in 1809 by St. Elizabeth Seton (1774-1821). This collection of 580 postcards "documents the spirituality and mission of the Vincentians" and includes images of institutions such as hospitals, churches, and seminaries in many U.S. states including California, Illinois, Indiana, Kansas, Kentucky, Louisiana, Missouri, Maryland, and Massachusetts. "Spanning 200 years, these postcards reflect the heritage of the religious orders, the growth of social institutions, advancements in technology, and changes in urban environments." Visitors can browse the full collection or use advanced and simple searches to locate images of particular interest. Full bibliographic information accompanies each image. This archive is of interest to anyone researching the history of religious institutions in 19th- and 20th-century America.

Kansas City's Local 627, one of several African American musicians' unions affiliated with the American Federation of Musicians, was founded in 1917. This website traces its history over the course of the 20th century. This history is divided into nine chronological sections, including introduction to the roots of Kansas City jazz style, early jazz bands, bigger bands and a new headquarters for the organization, jazz during World War II, the thriving music scene in the 1950s, the merger with Local 34, and the efforts of the Mutual Musicians Foundation to promote jazz in the 1960s and 1970s.

Upon entering each section, visitors are greeted by a video presentation of photographs of prominent Kansas City musicians and newspaper articles documenting their accomplishments, accompanied by a jazz soundtrack. In addition to explanatory text introducing musicians and prominent events in Kansas City history, each section also includes roughly 20 photographs, as well as a few songs of the era, which can be listened to using RealPlayer. Useful for those interested in Kansas City history or in U.S. music culture in the 20th century more generally.

Provides 43 social science statistical data studies on a variety of topics. Created as a service to researchers at the University of Wisconsin-Madison, the site includes 12 studies dealing with Wisconsin-related topics, 14 additional studies on American subjects, and 15 studies dealing with general or international matters. Subjects pertaining to American history include Slave Movement during the 18th and 19th Centuries; Irish immigrants in Boston in 1847 and 1848; Characteristics of Census Tracts in Nine U.S. Cities, 1940-1960; the growth, consumption habits, and finances of American families in the 1950s and 1960s; financial characteristics of consumers in the early 1960s; premarital sexuality in 1973; Dynamics of Idealism: Volunteers for Civil Rights, 1965-1982; urban racial disorders of the 1960s; class characteristics of U.S. Council of Foreign Relations members, 1922-1969; and the role of the American family in the transmission and maintenance of socioeconomic inequality. (See separate "History Matters" entries for above-listed hyperlinked sites.) Valuable for those studying American social history, especially in the Cold War period.

A small but well-constructed site on the activities and influence of the Communist Party (CP) in Washington State, where the CP had more significance than in most other areas of the U.S. The site contains 21 video excerpts of oral history interviews with five current members who describe experiences from the late 1930s to the present. Topics include the role of the CP in 1930s labor organizing, relations with the Soviet Union, the Red Scare that began in 1947, and anti-racism activity in the 1960s. Additional subjects cover relations with the New Left, plans for revitalization, methods of recruitment, and growing up in a Communist family. The site also offers nine essays totaling 25,000 words, accompanied by more than 200 images, that provide a narrative history of the movement. Users will also find 30 woodcut illustrations from two radical 1930s journals and an annotated timeline. This will provide a good introduction to radical politics on a local level.