Eustathius of Mtskheta was a Persian Christian martyr who lived in the region of Caucasian Iberia during the 6th century. Originally an Iranian cobbler named Gvirobandak and the son of a Zoroastrian priest, he converted to Christianity and fled to Georgia in 541. Following his conversion, he faced repeated persecution from Sasanian military authorities. He is remembered both as a religious figure who died for his faith and as a subject of one of the earliest surviving works of Georgian literature.