The find, which was made by staff from the Mamerki museum in northeast Poland and a group of volunteer historical searchers, is described as the biggest discovery ever made at the 200-hectare forest headquarters.
The entrance was found during a search of the area in northeast Poland using geo-radar. It has long been thought that the bunker complex, which lies close to where Hitler had his Wolf’s Lair HQ, could contain many WWII treasures, including the Amber Chamber.
The buried archive, thought to contain documents that would have been necessary if the plot to kill Hitler had been successful, are believed to include draft legal acts, as well as lists of people who would fill certain key positions.
A museum in Poland has recreated one of the greatest missing treasures of the Second World War – an Amber Chamber stolen from Russia by retreating Nazis.