Saint Pantaleon , counted in the West among the late-medieval Fourteen Holy Helpers and in the East as one of the Holy Unmercenary Healers, was a martyr of Nicomedia in Bithynia during the Diocletianic Persecution of 305 AD. 

Though there is evidence to suggest that a martyr named Pantaleon existed, some consider the stories of his life and death to be purely legendary.