The Editorial Board of The New York Times published an opinion piece, "Modern Art as Nazi Plunder", online April 14 describing the German government as "mishandling" the art collection of Cornelius Gurlitt (seized two years ago from his home and outed as "Nazi plunder" by FOCUS Magazine last November) and claim that more than a year, if needed, should be allowed to research the provenance of these paintings (here's the post linking to the press release announcing that Cornelius Gurlitt's art collection would be returned to him while provenance research continues).
German officials are scrambling to recover from their mishandling of a trove of artistic masterworks, including pieces reputedly looted from Jewish collectors, that had been hidden away since the Nazi era. ... The controversy is not likely to diminish under an agreement announced last week that provides for the art to be returned to Mr. Gurlitt’s technical ownership while a panel of art specialists is given a year to settle the provenance of questionable pieces. This may be no easy task. ... More claims are certain to be made as the full content of the trove is finally made public. The discovery of the trove has caused the German government to relax its 30-year statute of limitations on making claims to stolen property. ... If more than a year is needed for a full and fair study of the Munich trove, the German authorities should make that happen.