Landmarks - Amber Room

The Amber Room, originally crafted in the 18th century by German and Russian artisans, was a symbol of collaboration between the two nations. It was gifted to Russia and installed in Catherine's Palace. During World War II, the room was looted by German troops and has been missing since. Efforts to restore it began in the late 20th century, with only photographs and a single panel remaining. Recent discoveries have sparked hope, but the room's fate remains uncertain.

How did the discovery of a panel in 1997 impact the restoration efforts of the Amber Room?

What challenges do experts face in recovering the Amber Room, according to the text?