Father Justin Popovic (1894-1979) studied Theology in Serbia, Russia and England. In 1926 he was awarded a Doctor of Theology at the Theological School of Athens. In 1935 he was elected professor and later professor of Dogmatics at the Theological School of Belgrade. In 1945, however, he was forced by the communist regime to leave the University and confine himself to the monastery of his penitence, I.M. Celie. As the spiritual father of this monastery, he raised many of his spiritual children into modern figures of Serbian theology and life, while with his books he built and continues to build a multitude of theologians and Orthodox believers. Today, thirty years after his death, he is considered one of the most important personalities of the Church of Serbia. In 2010 he was declared a saint of the Serbian Church.