The image of Christ Pantocrator was one of the first images of Christ developed in the Early Christian Church and remains a central icon of the Eastern right Churches. Christ holds the New Testament in his left hand and makes the gesture of teaching or of blessing with his right. The name of Christ is written on each side of the halo, as IC and XC. Christ's fingers are depicted in a pose that represents the letters IC, X and C, thereby making the Christogram ICXC (for "Jesus Christ"). The IC is composed of the
Greek characters iota (Ι) and lunate sigma (C; instead of Σ, ς)—the first and last letters of 'Jesus' in Greek (Ἰησοῦς); in XC the letters are chi (Χ) and again the lunate sigma—the first and last letters of 'Christ' in Greek (Χριστός).
Christ has a cruciform halo inscribed with the letters Ο Ω Ν, i.e. ὁ ὢν "He Who Is".