The dēmarchos (Greek: δήμαρχος, lit. 'archon of the deme'; plural δήμαρχοι, dēmarchoi), anglicized as Demarch, is a title historically given to officials related to civic administration. In ancient Athens the title was given to the elected chief magistrate of each of the demes of Attica. In later literature, the term was used as a translation of the Roman office of tribunus plebis. In the Byzantine Empire the dēmarchos was the leader of one of the racing factions (then known as "demes") of the Hippodrome of Constantinople. Largely concerned with ceremonial in the early centuries, from the 11th century the title was applied to various administrative positions in Constantinople, until the end of the empire. In modern usage, the term is used for the mayor of a municipality.