Complex sentence: A dark red or brown block which was not necessarily glazed, it was used as imitation sandstone, brick or with real brownstone and associated with the architectural styles of Richard Upjohn, James Renwick, Jr., H. H. Richardson.
Split into simpler sentences: A dark red or brown block which was not necessarily glazed. It was used as imitation sandstone, brick or real brownstone and associated with the architectural styles of Richard Upjohn, James Renwick, H. H. Richardson.