The city is home to a number of large estates, including Gore Place, a mansion built in 1806 for former Massachusetts governor Christopher Gore, the Robert Treat Paine Estate, a residence designed by architect Henry Hobson Richardson and landscape architect Frederick Law Olmsted for philanthropist Robert Treat Paine, Jr. (1810–1905), and the Lyman Estate, a 400 acres estate built in 1793 by Boston merchant Theodore Lyman.