Emperor Hsuan-tsung's 
Set of Fifteen Jade Tablets
T'ang Dynasty
(A.D. 618-907)
Length:    29.5-29.8cm
Width:              2.8cm
Thickness:        0.7cm
     At times of peace 
and prosperity the emperor 
of China would celebrate 
the great Feng-shan rite 
at Mount Tai in Shantung 
province with these tablets
inscribed  with  prayers.  
The  upper  set  of  jade 
tablets were used by the 
T'ang emperor Hsuan Tsung 
(A.D. 713-755), and the 
other by the Sung emperor 
Chen Tsung (A.D. 998-1022).