Nilus of Sora was a 15th-century Russian Orthodox monk, theologian, and spiritual writer. Born into the Maikov nobility, he initially worked as a scribe before pursuing a monastic life. After traveling to the Holy Land, Greece, and Mount Athos, he became deeply influenced by the Hesychast movement. He eventually established the Sora Hermitage near the Kirillo-Belozersky Monastery. He is most recognized for leading the non-possessors, a group that advocated for monastic simplicity and opposed the extensive landownership held by religious institutions during his era.