It was a chamber fit for a queen. A fairy tale of a room, crafted almost entirely of six tons of glowing, translucent amber.
This lavish chamber, estimated to be worth $150 million today, was born from the hedonistic desire of Prussian King Frederic the First, for a room made completely of amber.
In the 300 years since Frederic built the Amber Room for his home at Charlottenburg Palace, it has dazzled kings and queens, trading hands between Russian and Prussian rulers.
During World War II, the Amber Room, dubbed the "Eighth Wonder of the World," was looted by the Nazis. Today, the fate of the original Amber Room remains one of Europe's great mysteries.
Never fully completed, the room's honeyed panels were sent to Russian Czar Peter the Great as a gift in 1716. The Amber Room soon became a gem inside the Catherine Palace, that rivaled Versailles.
The gesture sealed the Prussian-Russian alliance against Sweden, and over the centuries, it continued to be transferred back and forth, as a symbol of friendship between the two empires.
During World War II, Germany's Third Reich decided that the German-made Amber Room should be brought back to Germany, as a symbol of German greatness.
"It was of supreme importance to repatriate this gift, or rescue it from a subculture they viewed [as] Russia," explained Robert Alexander, author of "The Romanov Bride."
As the Germans approached, the terrified Russian curators were unable to dismantle or hide the Amber Room. The Nazis soon found it, returned it to Germany, and put it on proud display at Konigsberg Castle.
As the tide of war turned, and the Germans started losing ground, they grew worried about the Amber Room's safety, and boxed it up. Except for a few traces, no one has seen it since.
Before he died, the museum director who looked after the Amber Room during the war assured the people of Berlin that the room had survived heavy allied bombings, but gave no further clues.
The 65-year obsession with solving this mystery and finding the remains, has pulled in everyone from billionaire art lovers to the Stasi (East Germany's former secret police) to the KGB (the old Soviet Union's security force).
One conspiracy theory suggests that it is still buried somewhere beneath the castle.
"How would they know the Amber Room was down there, how would they know its value? They were just coming in to destroy the fascist army," said Alexander, who suggests that answer could be plausible.
Others say the Amber Room probably simply burned as the Red Army battled back against the Nazis. Skeptics say the whole city would have smelled the stench of burning amber, though.
Some historians say that the boxes were put on a German cruiseliner, which was sunk by Soviet torpedoes, but multiple dives have yielded no amber.
A recent tip led German investigators to an abandoned silver mine, south of Berlin, and to the shores of the Baltic, to dredge a murky lagoon. No luck in either case.
Though the hunt continues, and the mystery remains unsolved, a dazzling re-construction has now been built in its place.
"It captures the imagination and a certain hope against hope. The Amber Room is gone and nobody wants to believe that it's gone for good," said Alexander.