Frank B. Kellogg House, Minneapolis

This grand mansion, constructed in 1889 and polished to perfection with a 2004 renovation, was home to U.S. Senator Frank B. Kellogg—better known as the Nobel Peace Prize-winning architect of the Briand-Kellogg Pact that banned wars of aggression. Kellogg, who served as secretary of state, resided here until his passing in 1937. His other home in Washington, D.C., is now the Embassy of Sierra Leone.

Sprawling across a half-acre lot, this 9,356-square-foot residence comes complete with a reflection pool and a carriage house with space for four carriages (or modern cars, as it were). Its two-and-a-half stories showcase a harmonious blend of brownstone, red granite, and sandstone, creating an exterior that’s as stately as it is stunning. Meanwhile, the interior features four full bathrooms, one partial bath, five fireplaces, gleaming hardwood floors, a library worthy of a statesman, and a billiards room ready for post-dinner gatherings.

Fans of classic architecture will swoon over the house’s original 1880s design, a tasteful fusion of Queen Anne and Romanesque styles—two of the most fashionable architectural trends of the era. The 1923 addition blends so seamlessly, you’d think it had always been there.