
The image of the Christ Pantocrator (Christ Allmighty , Christ All-Powerful, or Christ Ruler of All) is a very iconic one that shepherds over many cathedrals, basilicas and churches with Byzantine art. The Pantocrator holds the New Testament on his left hand and is right hand is held in a blessing position.
Most of the ones I've seen are usually at the main apse displayed as a half dome above the altar, but I've also seen some circular ones. Regardless of the shape these images created in mosaics will take your breath away. So far my favorite one is the Pantocrator at the Cathedral in Cefalú, Sicily, a close up of which is seen above. I like it for two reasons: the cathedral itself is very simple so this image really captures you, and also because it is an image where Christ looks most human.
I hope you enjoy these images...