Product of a technique first used in ancient Egypt and later developed in ancient Rome. The outer of two superimposed layers of glass was ground away to leave a pattern consisting of a pattern standing in relief on a contrasting ground, usually white on dark blue. The finest surviving example is the Portland Vase (early 1st cent. ...
Site in Henan Province, China, c. 115 km north-east of Luoyang. Eight tombs of the late Warring States period (403–221