The Otis House was built in 1796 for Harrison Gray Otis, who would go on to become congressman from Massachusetts, mayor of Boston and one of the wealthiest Bostonians of the time. A U.S. National Historic Landmark, the house is now a museum, having been restored with careful attention to historical accuracy by the Historic New England organization. Museum visitors learn about the Otis family, life in Boston at the time and the history of the house from its beginning to today. Tours start every half hour and last approximately 45 minutes.