Gerontius was a prominent Russian Orthodox hierarch who served as the Metropolitan of Moscow and All Russia from 1473 until 1489. Originally the Bishop of Kolomna, he rose to the position of primate without receiving official approval from Constantinople. During his tenure, he navigated complex political tensions, including disagreements with Grand Prince Ivan III regarding church matters and advocating for resistance against the Golden Horde. Although he briefly resigned his post in 1482, he eventually returned to his leadership role through the intervention of the Grand Prince.