Joanisi (pia: Joanisi Mkuu, kwa Kigiriki: Όσιος Ιωαννίκιος ο Μέγας; Bitinia, 754/762 hivi - Antidium, 3 Novemba 846) alikuwa mmonaki, na hasa mkaapweke, maarufu kwa miujiza, katika maeneo ya Uturuki ya leo. Alisaidia kurudisha heshima kwa picha takatifu baada ya dhuluma ya serikali ya Dola la Roma Mashariki. Kabla ya kutawa alikuwa askari kwa miaka 20 . Tangu kale anaheshimiwa na Kanisa Katoliki kama mtakatifu. Sikukuu yake inaadhimishwa kila tarehe 3 Novemba au 4 Novemba . Watakatifu wa Agano la Kale Orodha ya Watakatifu Wakristo Orodha ya Watakatifu wa Afrika Orodha ya Watakatifu Wafransisko https://db.degruyter.com/view/PMBZ/PMBZ14532 Butler, Rev. Alban (2010). The Lives of the Saints. New York: Bartelby.  Venerable Joannicius the Great. Treadgold, Warren (January 2002). "Photius Before His Patriarchate". Journal of Ecclesiastical History 53. Cyril Mango, "The Two Lives of St Ioannikios and the Bulgarians", Harvard Ukrainian Studies VII (1983) (Okeanos: Essays presented to Ihor Swevcenko),393-404, esp. pp.396-400 http://www.santiebeati.it/nomi/Detailed/76060.html Martyrologium Romanum Συναξαριστής. 4 Νοεμβρίου. ECCLESIA.GR. (H ΕΚΚΛΗΣΙΑ ΤΗΣ ΕΛΛΑΔΟΣ). Ὁ Ὅσιος Ἰωαννίκιος ὁ Μέγας ὁ ἐν Ὀλύμπῳ.