 The art historian Julian Raby has argued that the term is misleading as the ewer is atypical and has instead proposed the term 'Baba Nakkaş ware' after the name of the leading designer attached to the Imperial court in Istanbul.The earliest surviving Iznik fritware objects, dating from probably around 1480, are believed to be a group of vessels painted in a dark cobalt blue in which much of the dense decoration is in white on a blue background.The vessels have separate areas of Ottoman arabesque and Chinese floral designs.