The Art of the Ottomans after 1600 – The Metropolitan Museum of Art https://www.metmuseum.org/essays/the-art-of-the-ottomans-after-1600
It became more profitable for artists to produce items for the open market than to be tied to the workshops of the low-paying court.
Washington, D.C.: Smithsonian Institution Press, 1980. Goodwin, Godfrey.