Nearly all of these threatened hospitals and portions thereof were built in the period 1935-1970. The 1930s hospitals that remain in the U.S. were usually built in the art deco style and stand as exemplars of that period. The more recent (post-1945) hospitals were nearly always designed in the International Style. These hospitals and parts thereof are also being lost by the thousands. Most of these facilities had been added on to haphazardly over the years with the result being – from an aesthetic, functional, and operational standpoint – a case of the sum total not performing to the level of any of its constituent parts.3