The tomb contained percussion, string and wind instruments in a remarkable state of preservation, including the largest assemblage of Bronze Age bells ever recovered. Discovered in 1977, near the city of Suizhou in Hubei Province in central China, the tomb, from the fifth century B.C., has long been considered "one of the most significant archeological discoveries of the 20th century," said Peter A. Young, editor in chief of the magazine.
Source: wiktionary