Monopthalmos Slaveson, (1315, ?) was a sage in York.
Monopthalmos believed in Catholic.
He lived a life of poverty. He was able to eat and sleep under a shelter, but ended with having no possession at all. He was considered as belonging to the lowest caste. However, he made some friends among it. People saw Monopthalmos as cultivated, eager to read and learn when possible, and mastering writing, which he did for friends. He was physically powerful, with a perfect body in a perfect health.He was iron-willed, achieving any goal he set.