Nazi gold train

de bene esse: literally, of well-being, morally acceptable but subject to future validation or exception

Nazi gold train could contain ornate £250m 'Amber Room' given to Tsar Peter the Great by the King of Prussia - and missing since it was looted during WWII 

The room, crafted out of amber, gold and precious jewels, was stolen from a Russian palace just outside St Petersburg in 1941, and taken to a Nazi-held castle in what was then East Prussia. But the precious room (replica, left) was never seen again after the city, now Kaliningrad, was marched on by the Red Army in 1945. Yet some have claimed the Nazis secreted it away - which has led author Tom Bower to hope it might be concealed on the 'gold train', hidden in a tunnel like this one (right) in southern Poland.