
The New York Public Library’s #SchomburgSyllabus, an important digital archive of Black history sources, organized by topic.
Map of the Transatlantic slave trade.

Routes of the First Great Migration, 1916-1930.

The migrants followed the nearest railroad routes out of their homeplaces.

Read about the centrality of railroads to the Great Migration.
The routes of the Second Great Migration, 1940-1970.

Chart showing the distribution of the African-American population during the two periods of migration.

Chart showing the movement over time of the black population out of the rural South.

Portia Maultsby’s timeline chart of African-American music.

Dr. Maultsby’s chart as a .pdf — view can be expanded.
Click to access maultsby-chart.pdf
View some beautiful hand-drawn graphs and charts made by W.E.B. Du Bois to quantify the African-American experience here:

The Freethought Trail, an interactive database of historical sites around New York State related to the abolition of slavery and other nineteenth-century progressive causes.
Black String Band Resources compiled by Jake Blount.