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The Jane C Sween Research Library is the main archives of the Montgomery County Historical Society. Located on the Montgomery History campus, the library posses many important collections involving the county's history, including newspapers, vertical files, books, pictures, maps, court and cemetery records, census records, genealogical material, and oral histories.

Exterior of the Jane C Sween Research Library

Wheel, Automotive design, Alloy wheel, Property

The Montgomery County Historical Society was founded as a branch of the Maryland Historical Society in 1944, and in 1951, it became a separate entity. Although the historical society had a couple of temporary homes, in 1965, the society moved into the Beall-Dawson house at 103 W Montgomery Ave. The historic early 19th-century house was adjacent to a 1940s frame garage, that was first used for museum space but underwent a renovation in 1975-77 to house the Jane C Sween Research Library. The library was also renovated again in 1992. In 2001, historian and librarian for 25 years, Jane Chinn Sween retired from Montgomery History, and the library was rechristened in her honor.

Sarah Hedlund, "The County's Historian: The Montgomery County Historical Society at 75 Years," The Montgomery County Story 62, no. 1 (Spring 2019): https://mchdr.montgomeryhistory.org/xmlui/bitstream/handle/20.500.12366/241/mcs_v062_n1_2019_hedlund.pdf?sequence=1&isAllowed=y.