By the time "Transylvanian" carpets appear in Western paintings for the first time, royal and aristocratic subjects had mostly progressed to sit for portraits which depict Persian carpets. Less wealthy sitters are still shown with the Turkish types: The 1620 "Portrait of Abraham Grapheus" by Cornelis de Vos, and Thomas de Keyser's "Portrait of an unknown man" (1626) and "Portrait of Constantijn Huyghens and his clerk" (1627) are amongst the earliest paintings depicting the "Transylvanian" types of Ottoman Turkish manufactory carpets. Transylvanian vigesimal accounts, customs bills, and other archived documents provide evidence that these carpets were exported to Europe in large quantities. Probably the increase in production reflects the increasing demand by an upper middle class who now could afford to buy these carpets. Pieter de Hoochs 1663 painting "Portrait of a family making music" depicts an Ottoman prayer rug of the "Transylvanian" type.