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Featured Primary Source Sets

Curated collections of primary and secondary sources focused on a single topic to inform and engage teachers and students.

Loggers in winter, Polk County, Minnesota

Lumber Industry in Minnesota

Learn how the lumber industry used natural resources, labor, technology, and transportation to harvest Minnesota's pine forests.

William Crooks locomotive

Minnesota's Three Major Railroads

Learn how three of Minnesota's major railroads formed and how they contributed to the development of Minnesota.

Sinclair Lewis at the door to his home in Duluth, 1944

Sinclair Lewis in Duluth

Read letters written by Sinclair Lewis about his house, work, and experiences while living in Duluth in the 1940s.

Three streetcars passing a military parade on Hennepin Avenue at 6th Street, Minneapolis, Minnesota

Twin Cities Streetcars - The Rise and Fall

Learn about the rise and fall of streetcars in the Twin Cities - the first public transit system in the area.

The number 17.

MDL Launches New Project Year

MDL is accepting applications for new projects! View our Call for Proposals for details.

MDL logo.

New MDL Online Exhibits

These exhibits explore wide-ranging topics in Minnesota history and draw on a variety of digitized materials from our contributors across the state.