 Other surviving van Eyck signatures are painted in trompe l'oeil on the wooden frame of his paintings, so that they appear to have been carved in the wood.In their book published in 1857, Crowe and Cavalcaselle were the first to link the double portrait with the early 16th century inventories of Margaret of Austria.They suggested that the painting showed portraits of Giovanni [di Arrigo] Arnolfini and his wife.