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Architect: Henry H. Richardson The County Courthouse is the masterpiece of the most noted American architect of the late nineteenth century, Henry Hobson Richardson. However, the impression that visitors receive as they enter the building does not initially support this evaluation. This is because the entry to the building has been changed to the original basement level, due to the lowering of Grant Street and surrounding streets in 1913. The original entrance lobby on the Grant Street side is reached by a flight of stairs, which open into a cavernous vaulted space defined by massive Richardsonian Romanesque arches.