P. T. Barnum's American Museum burned down under mysterious circumstances in 1865 after nearly a quarter century of patronage. The original museum tried both to entertain and educate with exhibits on natural history, American history, and reform efforts along with attractions of a sensational nature. With the exception of African Americans, who were barred from entry until the Civil War, New Yorkers of diverse ethnic, gender, and class identities mingled in the museum's shared cultural space.

Visitors to this website can explore an interactive 3D recreation of the museum or an archive of images, documents, accounts, and essays on 16 original Barnum exhibits, including the Fejee mermaid; Joice Heth, a former slave advertised as George Washington's nursemaid; "Swedish Nightingale" Jenny Lind; John Brown; Jefferson Davis; the Lincoln assassination; the Civil War in New York; and phrenology. The website allows visitors to immerse themselves in the popular culture of Barnum's era.

The Bureau of Refugees, Freedmen, and Abandoned Lands, also known as the Freedmen's Bureau, was established by the War Department in 1865 to supervise all relief and education activities for refugees and freedmen after the Civil War. The Bureau was responsible for issuing rations, clothing, and medicine, and had custody of confiscated lands in the former Confederate states and other designated territories. This website contains an extensive collection of Freedmen's Bureau records and reports.

Included are more than 100 transcriptions of reports on murders, riots, and "outrages" (any criminal offense) that occurred in the former Confederate states from 1865 to 1868. There are also 30 links to records and indexes of labor contracts between freedmen and planters between 1865 and 1872; seven links to related sites; six links to marriage records of freedmen, 1861–1872; and more than 100 miscellaneous state record items concerning freedmen.

Offering 16 separate databases of digitized materials, this website provides firsthand accounts (diaries, letters, and memoirs) and literary efforts (poetry, drama, and fiction). Twelve databases pertain to American history and culture.

"Early Encounters in North America: Peoples, Cultures, and the Environment" offers primary sources documenting cultural interactions from 1534 to 1850. "The American Civil War: Letters and Diaries" draws on more than 400 sources and supplies a day-by-day chronology with links to documents. "Black Thought and Culture" furnishes monographs, speeches, essays, articles, and interviews. "North American Immigrant Letters, Diaries, and Oral Histories" covers 1840 to the present. "North American Women's Letters and Diaries: Colonial to 1950" provides full-text letters and diaries from more than 1,000 women—totaling more than 21,000 documents and approximately 120,000 pages—written between 1675 and 1950.

Five databases present American literary writings: "Latino Literature"; "Black Drama"; "Asian American Drama"; "North American Women's Drama"; and "American Film Scripts Online." In addition, "Oral History Online" provides a reference work with links to texts, audio, and video files. While the databases include previously published documents, many also contain thousands of pages of unpublished material. In addition to keyword searching, the databases provide "semantic indexing"—extensive categorical search capabilities.