A was a priest of the ancient Roman religion who was assigned to one of eighteen deities with official cults during the Roman Republic. The most important three were the (or "major priests"), who served the important Roman gods Jupiter, Mars, and Quirinus. The remaining twelve were the ("lesser priests"). Two of the cultivated deities whose names are now unknown; among the others are deities about whom little is known other than the name. During the Imperial era, the cult of a deified emperor () also had a flamen.