Those recently browsing Zillow for 19th-century houses in New England may have come across a piece of political history: the childhood home of conservative-movement-maker William F. Buckley Jr.

Great Elm, in Sharon, Connecticut, is a Georgian colonial originally built in 1812 and massively expanded in 1929 to some 30 rooms. The house was converted into five condominiums in the 1980s, and its two south-facing units, owned by Buckley’s nephew, are currently on the market for $5.5 million.