Nazi Art hoard: $2 million spent and only 5 owners identified; nearly 700 works remain unreturned.

http://www.nytimes.com/2016/01/15/world/europe/gurlitt-art-collection-germany.html

Unfortunate how Jews during Hitler's regime lost lives, not to mention their belongings (art included).
You wonder why more people haven't come forward to claim their art?