He had then reigned three years, as he had governed his tetrarchies three other years.
"The Wars of the Jews or History of the Destruction of Jerusalem" by Flavius Josephus
They called it the Club of the Tetrarchy, because they thought it grand to have a Greek name.
"Christmas Eve and Christmas Day" by Edward E. Hale
Roman Empire at the time of the Tetrarchy, the, 41.
"Above the Battle" by Romain Rolland