Built in 1849, this barnlike neoclassical Congregational church was a stop on the Underground Railroad. The famous abolitionist Henry Ward Beecher was the first pastor; a sculpture of him by Gutzon Borglum, who later chiseled Mount Rushmore, stands in the colonnaded courtyard visible from Orange Street. The architecture of the brick building may seem simple, but its open, theaterlike interior inspired many subsequent American Protestant churches. Three Louis C. Tiffany stained-glass windows were added in the 1930s. A fragment of Plymouth Rock can be found in an adjoining arcade.