Was Van Gogh's olive grove landscape another Nazi-era 'forced sale'?
We uncover the tangled tale of the painting controversially sold off by New York's Metropolitan Museum of Art in 1972 and now in an Athens museum
How an old postcard helped Jewish heirs retrieve their Kandinsky painting from a Dutch museum
The work, which has been in Eindhoven's Van Abbemuseum since the early 1950s, originally belonged to a collector who died in the Holocaust
Provenance database shines light on looted art in Bavarian collections
Munich-based foundation follows other German institutions in quest for transparency, disclosing ownership of 1,200 works acquired since 1933 with over 500 pieces flagged as "former Nazi property"