Constantine Chrysomalus (or Constantine Chrysomallus; Greek: Κωνσταντῖνος Χρυσόμαλλος) was a Byzantine monk who was posthumously condemned by a Synod of Constantinople as a teacher of heresies affiliated with Bogomilism and Messalianism. Although Chrysomalus and his writings, the Golden Sermons, had been accused of promoting Bogomil teachings, his association with Bogomilism has been contested by later scholars.