From the Associated Press via ynetnews.com:
The University of
Oklahoma for more than a decade has exhibited a piece of Nazi-looted
artwork bequeathed to it by the wife of an oil tycoon. But renewed
claims by a family that owned the oil painting before World War II has
drawn the US school into a fight it thought was settled in Switzerland
more than 60 years ago.
Camille Pissarro's "Shepherdess Bringing in Sheep," an 1886 painting
that once belonged to a French Jew, fell into Nazi hands as Germany
overran Europe. The school maintains it is the painting's rightful
owner, citing a Swiss court decision from 1953.