The Rosie of the Eastern Orthodox Prayer

A lot of people don't realize that the Rosie is prayed in the east. It's called the rule of the Fair of Tocos. The prayer consists of 150 Hail Marys essentially, which are divided into 15 decades. Some believe that the mother of God showed the rule to people in the eighth century AD. But it was later forgotten and was rediscovered for Eastern Christians by Saint Seraphim of Serov.