in 1456. Works Jan van Eyck produced paintings for private clients in addition to his work at the court. Foremost among these is the Ghent Altarpiece painted for the merchant, financier and politician Jodocus Vijdts and his wife Elisabeth Borluut. Started sometime before 1426 and completed by 1432, the polyptych is seen as representing "the final conquest of reality in the North", differing from the great works of the Early Renaissance in Italy by virtue of its willingness to forgo classical idealisation in favor of the faithful observation of nature. Even though it may be assumed – given the demand and fashion – that he produced a number of triptychs, only the Dresden altarpiece survives, although a number of extant portraits may be wings of dismantled polyptychs. Telltale signs are hinges on original frames, the sitter's orientation, and praying hands or the inclusion of iconographical elements in an otherwise seemingly secular portrait. About 20 surviving paintings are confidently attributed to him, all dated between 1432 and 1439. Ten, including the Ghent Altarpiece, are dated and signed with a variation of his motto, ALS ICH KAN. In 1998 Holland Cotter estimated that "only two dozen or so paintings...attributed...with varying degrees of confidence, along with some drawings and a few pages from...the Turin-Milan Hours". He described the "complex relationship and tension between art historians and holding museums in assigning authorship. Of the 40 or so works considered originals in the mid 80s, around ten are now vigorously contested by leading researchers as workshop". Turin-Milan Hours: Hand G Since 1901 Jan van Eyck has often been credited as the anonymous artist known as Hand G of the Turin-Milan Hours. If this is correct, the Turin illustrations are the only known works from his early period; according to Thomas Kren the earlier dates for Hand G precede any known panel painting in an Eyckian style, which "raise[s] provocative questions about the role that manuscript illumination may have played in the vaunted verisimilitude of Eyckian oil painting". The evidence for attributing van Eyck rests on part on the fact that although the figures are mostly of the International Gothic type, they reappear in some of his later work. In addition, there are coats of arms connected with the Wittelsbach family with whom he had connections in the Hague, while some of the figures in the miniatures echo the horsemen in the Ghent Altarpiece. Most of