St. Sergius of Radonezh (St. Sergey Radonezhsky)

St. Sergius of Radonezh was a 14th-century Russian monk and spiritual leader known for revitalizing monastic life and promoting Christian faith in Russia. Renowned for his humility, wisdom, and deep prayer life, he founded the Trinity Sergius Lavra, a prominent monastery that became a spiritual and cultural center. Sergius played a key role in uniting Russian princes against external threats and fostering national identity through faith. Celebrated as a saint in the Russian Orthodox Church, he is revered for inspiring spiritual renewal, humility, and dedication to God.