In Brooklyn, New York, a remarkable Gilded Age mansion has been put up for sale at a price of $16 million. This historic residence is situated at 842 Carroll Street and is notable for its connections to Theodore Roosevelt, as it was built for his Harvard classmate, George W. Kenyon. The mansion, designed by esteemed architect C.P.H. Gilbert in 1887, encompasses 18 rooms and measures 32 feet wide, making it the broadest single-family townhouse currently available in Brooklyn. This distinguished listing now holds the title of the most expensive residential property in the Park Slope area. Originally constructed in the late 1800s, the property has been well-preserved by its current owners, who have maintained much of its original character while also implementing modern amenities. The property has only had four owners since its inception, which significantly contributes to its historical integrity and preservation. The mansion boasts over 8,000 square feet of living space, complete with 10 working fireplaces, highlighting its spaciousness and grandeur. The owners utilized original materials like mahogany and oak in their renovations, showcasing traditional craftsmanship and ensuring continuity with the 19th-century design. One feature that sets this property apart is its custom sidewalk, meticulously designed with the same herringbone brick that adorns the home's façade. Mackenzie Kyle, a real estate agent involved in the listing, underscores the uniqueness of the mansion and emphasizes the rarity of such well-preserved properties designed by C.P.H. Gilbert that remain configured as single-family residences. This mansion not only represents a significant piece of architectural history but also reflects the luxury residential market in Brooklyn, which has been steadily appreciating over recent years. In the broader context, the housing market in Brooklyn has seen a remarkable increase, with median home prices surpassing $1 million for the first time in the third quarter of 2025. This trend underlines a shift in the residential landscape, influencing the types and prices of available properties. Renovation projects, as seen in this mansion, often aim to improve energy efficiency and enhance properties, addressing both personal comfort and market demands. The presence of a Gilded Age home linked to such a prominent figure as Theodore Roosevelt adds significant historical and cultural value, elevating the overall interest in such listings within the competitive real estate market.