PHILADELPHIA (AP) — Anne d'Harnoncourt, the longtime chief executive of the Philadelphia Museum of Art and one of the art world's most influential women, has died. She was 64.

D'Harnoncourt died at home in Philadelphia on Monday morning of natural causes, museum spokesman Norman Keyes said. He said her death was unexpected but did not elaborate.

D'Harnoncourt came to the museum in 1967 as a curatorial assistant. She became museum director in 1982 and was named to replace Robert Montgomery Scott in 1997 as the museum's chief executive.