trierarchus

At Athens the the leitourgia was the public service performed by the wealthier citizens at their own expense, such as the office of gymnasiarch, who superintended the gymnasium, that of choregus, who paid the singers of a chorus in the theatre, that of the hestiator, who gave a banquet to his tribe, of the trierarchus, who provided a warship for the state.

The Catholic Encyclopedia, Volume 9: Laprade-Mass Liturgy 1840-1916 1913

Circumfiftunt ledum percuflbres, & prior trierarchus fufti caput ejus ad - flixit.

C. Cornelii Taciti opera omnia. ... 1790