John XIII of Constantinople

John XIII of Constantinople (Greek: Ἰωάννης; died after 1320) was the Ecumenical Patriarch of Constantinople from 1315 to 1319.^[1] Prior to becoming the patriarch, he had served in the laity and his name was Glykys Melodos; he was sometimes referred to as John Glykys.^[2][3] One of his students was the Byzantine astronomer and scholar Nicephorus Gregoras.^[4] John XIII resigned on 11 May 1319.

John XIII of Constantinople
Ecumenical Patriarch of Constantinople
Church	Church of Constantinople
In office	12 May 1315 – 11 May 1319
Predecessor	Nephon I of Constantinople
Successor	Gerasimus I of Constantinople
Personal details
Died	After 1320
Denomination	Eastern Orthodoxy

Notes and references

1. Nicol, Donald M. (14 October 1993). The Last Centuries of Byzantium, 1261–1453. Cambridge University Press. p. 105. ISBN 978-0-521-43991-6.
2. Bryer, Anthony; Georghallides, G. S. (1993). The Sweet Land of Cyprus - Papers Given at the Twenty-fifth Jubilee Spring Symposium of Byzantine Studies, Birmingham, March 1991. Cyprus Research Centre. p. 382. ISBN 978-9963-0-8024-3.
3. Kiminas, Demetrius (1 March 2009). The Ecumenical Patriarchate. Wildside Press. p. 36. ISBN 978-1-4344-5876-6.
4. Christian-Muslim Relations - A Bibliographical History, Volume 5 (1350–1500). Brill Publishers. 28 June 2013. p. 133. ISBN 978-90-04-25278-3.

Eastern Orthodox Church titles
Preceded by Nephon I	Ecumenical Patriarch of Constantinople 1315 – 1319	Succeeded by Gerasimus I