Сергий Радонежский
Much information about Sergius and his acts is taken from the writing of his life composed in the 15th century, which has come down to us in many later editions in the 15th to 20th century Russian manuscripts. The memory of Sergius of Radonezh has lived on thanks to the unique manuscript entitled "The Life of St. Sergius of Radonezh" written by famous hagiographer Pachomius the Serb, also known as Pachomius Logothetes. The original manuscript is housed in the National Library of Russia.