A new film focuses on two paintings Stern was forced to sell as the Nazis rose to power in the 1930s, which ended up at the Düsseldorf City Museum

A previous version of the show was due to open in 2018, but was cancelled at short notice. Now it is being shunned.

Auctioneer Frank Hargesheimer compensates consignor, sees “moral duty” to restitute art lost due to Nazi persecution