Organization. In Deesis depictions, Christ as Pantocrator sits enthroned in heaven at the center, flanked by the Virgin Mary and John the Baptist.
Theme of mercy in judgment of humanity. The Virgin and John the Baptist appeal to Christ on behalf of humanity for mercy at the time of judgment.
Ideal intercessors. They were ideal intercessors due to their intimate relationships with Christ: the Virgin as mother and John as cousin.
Implied two-step prayer process. Intercession, then, involves a two-step prayer process. First, the faithful Christian standing before the Deesis presents a petition to one of the intercessors, who, in turn, presents it to Christ.