This distinctive bowl is from one of the earliest periods of Islamic ceramic production. Its shape and opaque white glaze appear to be inspired by Chinese stoneware bowls. exported to the Middle East in the ninth and tenth centuries. The pioneering use of cobalt blue glaze on white ground by the 'Abbasids, who ruled Iraq from 750 to 950, proved to be a successful combination that influenced Islamic ceramic production for centuries. Significantly, this bowl carries the potter's signature: "Among those things Abu'l-Taqi [Father of the Pious One] made."