National Trust for Historic Preservation Awards The National Trust for Historic Preservation just announced its National Preservation Awards for stellar contributions to protecting America's heritage. They represent the best successes in preserving, rehabilitating and interpreting our country's architectural and cultural heritage. Here is a look at some of the 23 winners. White Stag Block, Portland, Ore. -- In one of America's greenest cities, three long-vacant historic commercial buildings have been brought back to life in a textbook example of sustainable development. Sally Painter/Courtesy National Trust for Historic Preservation