A portrait by Eglon van der Neer, a 17th-century Dutch painter, will remain in the collection of the Museum of Fine Arts.

The Museum of Fine Arts in Boston said it would pay an unspecified amount to the heir of an art dealer who was killed at Auschwitz and will keep a 17th-century Dutch painting in its collection that was once owned by the dealer and likely seized by the Nazis. The Boston Globe reported that after a lengthy investigation into the work, an oil portrait by the Dutch painter Eglon van der Neer, the museum determined that it had belonged to Walter Westfeld, who had run a German gallery shut down by the Nazis in 1936 and who was sent to Auschwitz in 1943. The museum, which purchased the painting in 1941, posted an image of it online in 2000 amid concerns about its provenance; in 2004 it was contacted by Fred Westfield, a nephew of the art dealer. Mr. Westfield, a retired economics professor in Tennessee, learned about the painting from a Google search. The Globe said that the museum had in recent years returned other works stolen during World War II. It also fought a legal battle to keep the Oskar Kokoschka painting “Two Nudes (Lovers)”; a federal appeals court ruled last year that it was the rightful owner of this work.