*[http://www.ec-patr.org/default.php?lang=en/ Official website of the Patriarchate of Constantinople]
*[http://www.ecupatria.org Official website of the Permanent Representation of the Ecumenical Patriarchate to the World Council of Churches]
*[http://www.cnewa.org/ecc-bodypg-us.aspx?eccpageID=13&IndexView=toc Eastern Christian Churches: Patriarchate of Constantinople] by Ronald Roberson, a Roman Catholic priest and scholar
*[http://www.goarch.org/en/ourfaith/articles/article8148.asp The Origins and Authority of the Ecumenical Patriarchate of the Orthodox Church], by [[Demetrios Constantelos|Demetrios J. Constantelos]]
*[http://www.myriobiblos.gr/texts/english/milton1_6.html Constantinople and Rome: A Survey of the Relations between the Byzantine and the Roman Churches], by Milton V. Anastos
*[http://www.ec-patr.gr/patrdisplay.php?lang=en&id=5 Brief Historical Note Regarding the Ecumenical Patriarchate], from the official website
*[http://www.byzantium1200.com/ Byzantium 1200] (Byzantium 1200 is a project aimed at creating computer reconstructions of the Byzantine Monuments located in Istanbul, TURKEY as of year 1200 AD).
*[http://www.patriarchate.org/media/vrtour_patriarchate.php Virtual tour]