For 63 years, a modernist sculptural mural in the lobby of Pfizer’s world headquarters on East 42nd Street in Manhattan celebrated a millennia-long parade ofmedical pioneers like Hippocrates and Louis Pasteur.

The eye-catching metalmural, called “Medical Research Through the Ages,” by the Greek-born Nikos Bel-Jon, was visible through tall glass windows to passing New Yorkers as well as visiting dignitaries headed to the United Nations down the street.