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Ironmaster William Jenkins's late Federal-style country house has the hallmark scale of other iron industry houses that served as both residence and office. The delicate detail of the central block with fanlighted door and segmental-headed dormers looks back to the past, while the wings with their oversized central windows on the second story clearly look to Robert Mills's Philadelphia town houses of the previous decade. James Buchanan acquired the house in 1849 and lived here while he was president of nearby Franklin and Marshall College and then returned to it after his single term (1857–1861) as president of the United States. It is now a museum house.