Gerro maebyeong

Celadon, which are green-glazed stonewares fired at a high temperature (1,100-1,200 °C) in a reducing atmosphere, are a Chinese invention that, in Korea, attained a high degree of perfection during the Goryeo dynasty, to the extent that contemporaneous China considered them to be "the best under heaven". Around the 7th and 8th centuries, Korean ceramics, and celadon in particular, evolved, with the simplification of forms, as can be seen from the bowls and maebyong vases, and the decoration incrusted below a delicately coloured glaze, which generated great admiration among the court of Beijing.