Mark of the Caves was an 11th-century monk and hermit associated with the Kyiv Pechersk Lavra. Also known as Mark the Grave-digger, he is recognized for his spiritual abilities, specifically his capacity for discernment and his intense intercessory prayer. His life and his relationship with the brothers Theophil and John are documented in the Kiev Caves Paterikon, which preserves the history of these ascetics.