Ambrose of Belaya Krinitsa was a 19th-century Greek-born prelate who served as the first metropolitan of the Russian Orthodox Old-Rite Church. Born in the Ottoman Empire in 1791, he initially held various ecclesiastical positions within the Greek Church, including serving as the abbot of the Holy Trinity Monastery on Halki. After entering into communion with the Old Believers in 1846, he helped establish a full church hierarchy for them, a role that led to significant diplomatic tension between the Russian and Austrian empires.