Mass Moments tells us:
He designed nearly 80 buildings, including churches, libraries, railroad stations, and private homes, many of them in Massachusetts. His buildings were visually striking and beautifully proportioned. He used forms inspired by early medieval churches, including rounded arches, massive towers, and rugged stone walls, with blocks often laid in bands of contrasting color. Widely copied across the nation, "Richardsonian Romanesque" became the first and only architectural style ever named after an American. (read the restHere, some examples of neo-Romanesque buildings (though none by Richardson himself) in the Pioneer Valley:
Amherst Town Hall (H.S. McKay, 1889-90)
Hampshire County Courthouse, Northampton (Henry F. Kilbourn, 1884-86)
Forbes Library, Northampton (William Brocklesby; opened 1894)
In Harmony with the Architecture: The Furniture of H.H. Richardson."