Shoptalk—deciphering architectural and historic preservation jargon one word at a time!
building addition that is visually distinguishable from the historic building yet respects the original architecture in design, scale and materials; addition that resembles the historic without duplicating the original design (Source: National Park Service, Preservation Briefs, #14 New Exterior Additions to Historic Buildings: Preservation Concerns)
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Gwynn Hall’s, University of Missouri–Columbia, southwest entrance tower addition on the building's rear elevation is compatible with the historic building’s massing, size and scale. The addition was differentiated from the historic gothic-style building through modern design—smooth stone instead of rough cut and glass elements—yet remained compatible with the use of appropriate materials and design elements—white limestone and narrow windows.