Smith-Duncan House and Eastman Barn

The Smith-Duncan House and Eastman Barn are two historic buildings located on the Duncan Farmstead at Pere Marquette State Park in Jersey County, Illinois. The Smith-Duncan House is a two-story limestone house built circa 1861. The house has a double-pile plan, in which each story is two rooms deep, with a central hall. The Eastman Barn has three interior sections and is built on a raised limestone foundation; this arrangement allowed for threshing and storage to be done in the barn and provided a basement space for livestock. A gabled cupola on the barn's roof allows for air to vent from the structure. Both buildings, as well as two contributing retaining walls on the property, are well-preserved examples of local stonework; limestone was a common building material in the Grafton area during the mid-19th century.[2]

Smith-Duncan House and Eastman Barn
U.S. National Register of Historic Places
The Eastman Barn
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Location	Illinois Route 100 at Pere Marquette State Park, 2,000 feet (610 m) west of Deer Lick Hollow
Coordinates	38°58′09″N 90°30′43″W
Area	0 acres (0 ha)
Built	1861 (1861), 1876
Architectural style	Central hall-double pile
NRHP reference No.	99001379[1]
Added to NRHP	November 22, 1999

The buildings were added to the National Register of Historic Places on November 22, 1999.[1]