Claim: The Oliver and Lucy Bonnell Gothic Arch Roofed Barn (located in Park County, Montana about 5 miles southest of the town Clyde Park) was listed on the National Register of Historic Places in 2004 and was deemed notable as "an excellent and rare example" of a Gothic arched-roof barn, the only one in Park County and one of only 10 known in Montana.
Evidence: The Oliver and Lucy Bonnell Gothic Arch Roofed Barn in Park County, Montana, or simply the Bonnell Barn, is a Gothic-arch barn which was built in 1922. It is about 5 miles (8.0 km) southeast of the town Clyde Park. It was listed on the National Register of Historic Places in 2004. It was deemed notable as "an excellent and rare example" of a Gothic arched-roof barn, the only one in Park County and one of only 10 known in Montana.