From China, c. 15th century.
At the time, it was believed that poisoned food made the celadon discolor; therefore this kind of ceramics was very popular with the Ottoman upper-class.

Celadon is a term for ceramics denoting both a type of glaze and a ware of celadon (color). Celadon originated in China; its production later spread to other regions in Asia, such as Korea and Thailand. It originated at beginning of the Northern Song Dynasty (960–1127), although celadon-like ceramics where excavated lately from graves which are some 700 years older. Celadon glazes can be produced in a variety of colors, including white, grey, blue and yellow. The most famous shades range in color from a very pale green to deep intense green, often meaning to mimic the green shades of jade.

Correspondent: J.M.Criel, Antwerpen.
Sources: ‘Treasures of the Topkapı Palace’ & Wikipedia .