In 1923, he stayed for some time at the monasteries of Mount Athos, where he discovered the technique of Byzantine iconography.
Two years later, he married Maria Hatzikambouri, who was also from Aivali/Kydoniai (modern day Ayvalık, Turkey) and moved to Greece in 1922.
[3] Kontoglou was also the original iconographer of the main iconography at the Greek Orthodox Church of the Holy Trinity in Charleston, South Carolina.
[4][5] The iconography on the dome and other areas of the Archdiocesan Cathedral of the Holy Trinity in New York City was created by Georgios Gliatas, a student of Kontoglou.
[7] Kontoglou also wrote various works of literature as well as numerous essays, winning the Academy of Athens Prize for his book Ekphrasis published in 1961, championing orthodoxy but also criticising moves by the then Patriarch Athenagoras towards Ecumenism, which he believed would compromise Orthodox values.