A Life of the assassinated Bishop Sergius (Kudryavtsev), †1955 on May 18, 2023 Catacomb Bishops +2 Forgotten heroes of the catacombs History of the Catacomb Church Lives of Catacomb Saints and Confessors Catacomb Bishops Forgotten heroes of the catacombs History of the Catacomb Church Lives of Catacomb Saints and Confessors