Or maybe there's also another kind of preservation at work.
In 2006, he began giving an annual talk on sound preservation at the Library of Congress.
Preservation at the sites often depends on the advocacy of state and local preservationists, he added.
Chusid, a heavy-lidded man with a gray-and-white beard, teaches historic preservation at Cornell.
"We think it's feasible and prudent," said Vicki Weiner, director of historic preservation at the society.
"This is historic preservation at its best," she said, "from a very cultural point of view".
Her death was announced by Norton Owen, director of preservation at the Jacob's Pillow Dance Festival in Becket, Mass.
"In historic districts, the commission always regulated the entire lot," said Sarah Carroll, the director of preservation at the agency.
Now, why might that be? "They're not attractive," said Sarah Carroll, director of preservation at the Landmarks Preservation Commission.
"This is a beautiful example of its time and style," said Donald Friedman, director of preservation at LZA/Thornton-Tomasetti.
He came to New York in 1985 for the graduate program in architectural preservation at Columbia University.
