^Freely 2011, p. 35: "The mosques of the classical period are more elaborate than those of earlier times. They derive from a fusion of a native Turkish tradition with certain elements of the plan of Haghia Sophia, the former cathedral of Constantinople, converted into a mosque in 1453 by Mehmet the Conqueror."
^Ostergren & Le Boss 2011, pp. 215–216: "The grand tradition of Ottoman architecture, established in the 16th century, differed markedly from that of the earlier Moors. It was derived from both the Byzantine Christian tradition, outlined above, and native Middle Eastern forms used by the Islamic Seljuk Turks, who preceded the Ottomans. The Byzantine tradition, particularly as embodied in Hagia Sophia, was perhaps the major source of inspiration."
^M. Bloom, Jonathan; Blair, Sheila S., red. (2009). "Ottoman". The Grove Encyclopedia of Islamic Art and Architecture (në anglisht). Oxford University Press. ISBN9780195309911.