English: Built in 1857 in Rundbogenstil style, this house was designed by the German immigrant architect August Kutzbock for Napoleon Bonaparte Van Slyke, who never actually resided here. It was renovated circa 1870 in the Second Empire style, adding the mansard roof and extending the rear service ell. Dr. George Keenan, a prominent Madison physician, resided here from 1900 to 1916, and the house now bears his name. The house is clad in buff brick with extruded corner pilasters and corbeling below the roof, arched replacement windows trimmed by decorative stone headers and pilasters, a brick side porch with a balcony accessed via an arched french door, and an arched front opening, two one-story bay windows on the front facade, a front entrance vestibule with an arched transom, stone corner trim, and a second-story balcony with a brick railing on the roof, accessed via an arched french door, a mansard roof with a taller portion above the front entrance bay, metal cresting, dormers with vaulted roofs and decorative trim, decorative trim at the edges of the roof, a sandstone block base, a gabled rear ell with a shed roofed side wing featuring an entry door with a canopy featuring dentils and decorative brackets, and three brick chimneys with decorative corbeling. The house, now utilized as an apartment building, is a contributing structure in the Mansion Hill Historic District, listed on the National Register of Historic Places in 1997.