satrap, the
The title designated a representative of the Persian king, and was widely used in the Persian language. In ancient writers the term usually designates an official of the Persian empire who assumes highest political and military power within the limits of his satrapia, the division under his command. Alexander the Great introduced the institution to the administrative organisation of his empire in the East.In the Roman empire, the office of the satrap was hereditary for Armenian nobles who administered an Armenian klima (=canton, a historic-geographical unit); in the case of the Armenian territories inside the Roman Empire, the satrap yielded limited power under the suzerainty of the Roman emperor.

Vitruvius
Roman architect, engineer and author of the treatise, De architectura, compiled partly from his own experience and partly from work by famous Greek architects. He lived in the 1st century BC.