1935 sale of the Guelph Treasure predates the Holocaust “by several years”, Prussian Cultural Heritage Foundation said in US court papers

The heirs of the Viennese entertainer Fritz Grünbaum, who died in Dachau, go to court in New York to recover his art

The twists and turns of a mistaken provenance meant a work by Kirchner had entered the museum’s collection under the wrong title and date

Greta Moll’s heirs argue painting was “misappropriated” in 1947

Jean-Antoine Houdon's sculpture of the goddess Diana was taken by the Nazis during the Second World War

Late 18th-century Vincenzo Chilone regatta scene once owned by John and Anna Jaffé is due to be sold at Christie’s

At handover, the French dealer and collector Christian Deydier says he hopes all the objects taken from ancient tombs will “return home and be united”

The institution will get to keep the brilliantly illuminated gospel pages in its collection after legal settlement

Painting’s sale was forced but not by Nazis, report concludes

Case reopened after new information provided by Hungary

Country’s president applauds “unusual” restitution but calls out international museums that display objects stolen from Latin American

One of the main art databases, the Art Loss Register, has issued certificates for works looted or subject to recovery claims

State’s House of Representatives urges Fred Jones Jr Museum of Art to step up its provenance research

Sotheby’s to auction looted painting by Liebermann that was returned to heirs last week

Heirs of Paul Rosenberg retrieve a looted Matisse painting, more than two years after it was discovered along with 1,300 others

Concerns raised after François Pinault returns looted artefacts as diplomatic gesture

Aristocratic family has been fighting for the return of castles, palaces and art for the past 20 years

But critics say the focus should be on how provenance research can be carried out efficiently and rapidly