Original sentence: Georgia became one of the pre-eminent nations of the Christian East, their pan-Caucasian empire stretching, at its largest extent, from the North Caucasus to the northern portion of Iran and Anatolia, while also maintaining religious possessions abroad, such as the Monastery of the Cross in Jerusalem and the Monastery of Iviron in Greece
Edited sentence: Georgia became one of the pre-eminent nations of the Christian East and its pan-Caucasian empire stretched from Eastern Europe to Anatolia and northern frontiers of Iran, while also maintaining religious possessions abroad, such as the Monastery of the Cross in Jerusalem and the Monastery of Iviron in Greece