But his signature work, "Joe" (1983), is pretty remarkable all by itself, and it's invaluable to see it preserved for future generations.

"You can't kill it," he once said of his signature work.

Shapiro's signature work was a two decade study of the male experience of fatherhood.

His signature work though was his target of the tenement slums in the state.

His signature work, perhaps appropriate for a philosopher, consists of reflections.

"The 900 Number" remains his signature work, having been resampled by many artists.

The couple share different aspects of the signature work so the instruments appear to have been made by the same hand.

The Grosz painting, which has been appraised at between $10 million and $12 million, is a signature work of the 1920's.

Black And White has been noted as the signature work in American leftist dance.

There was an appropriate reverence here, given the 1947 ballet's status as a signature work of classical ballet.