The Amber Room is a unique and elaborate chamber in the Catherine Palace, made of gold leaf and mirrors and topped with amber panels. The original Amber Room was built in the Berlin City Palace before being given to Tsar Peter the Great in 1716. He brought it to the Catherine Palace where it was painstakingly rebuilt and expanded to include over 13,000lb (6 tonnes) of amber. During World War II efforts were made to hide the Amber Room behind wallpaper but eventually, it was discovered by German soldiers, who disassembled it and had it taken to Königsberg. In January 1945, Hitler ordered the looted items in Königsberg to be moved, but in the confusion, the Amber Room was lost. Though sightings have been reported since the end of the war, none of them have proved reliable, and only one small set of fragments was recovered from the family of a German soldier who claimed to have been involved in the theft. It’s now believed that the room was destroyed at some point in the 1940s, potentially by accident, as the materials would have been extremely fragile and difficult to move. In 1979 the Russian government decided to build a replica at the Catherine Palace, a project that took 24 years, 350 different shades of amber, and the collaboration of 40 Russian and German experts in the rare skill of amber craftsmanship. The room is as close as possible to the original, which would be priceless if it were ever valued. The replica which you can see in the Catherine Palace today has an estimated value of over $500 million.