Nilius of Sora, also Nil Sorsky and Nil Sorski, in Russian: Нил Сорский, was a leader in the establishment in Russia of skete style monasticism in the fifteenth century and of a movement that opposed ecclesiastic ownership of land, a movement known as non-possessors. While not formally glorified, he is venerated as a saint in the Church of Russia. His feast day is on the anniversary of his death on May 7.