Dionysius III of Constantinople (; died 14 October 1696) was the Ecumenical Patriarch of Constantinople from 29 June 1662 to 21 October 1665. He had previously been bishop of Thessaloniki, Larissa (1652–1662) and Bursa.Venance Grumel, Traité d'études byzantines, « I - La Chronologie », Presses universitaires de France, Paris, 1958, p. 438.
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