“Claudius made him tetrarch of the provinces of Philippi and Lysanias, with the title of king.”

“Each tribe divided its territory into canton-like tetrarchies, ruled by a tetrarch supported by a judge and a general.”

“But the tetrarch has formally forbidden that any man should raise the cover of this well.”

“Recognizing the emperor's vulnerability, he also chose to divide authority among four rulers, known as the tetrarchs.”

“Four of Herod's sons ruled the kingdom divided into four tetrarchies, so the rulers were called tetrarchs, not kings.”

“When Diocletian divided authority between the tetrarchs, each of them established a capital in a different region of the empire and embellished it with appropriate grandeur.”