Trierarchy
A trierarchy (Greek: τριηραρχία, romanized: trierarchia) was a type of obligation called a liturgy, a debt similar to a tax on the very wealthy in Ancient Athens. The person (or persons) up on whom the duty fell is called a trierarch. The trierarch was responsible for the outfitting, maintenance, operation and leadership of a warship known as a trireme, the hull and mast of the ship being provided by the State. The responsibility might fall on one person or be shared, in which case it was known as a syntrierarchy. The cost of a whole trierarchy was not less than forty minas nor more than a talent with the average being 50 minas.