Dionysius ignored the existing table used by the Patriarchate of Rome, which was prepared in 457 by Victorius of Aquitaine, complaining that it did not obey Alexandrian principles, without actually acknowledging their existence. To be sure that his own table was correct, he simply extended a table prepared in Alexandria that had circulated in the west in Latin, but was never used in the west to determine the date of Easter (however, a variant of it was used in the Byzantine Empire, in Greek). The Latin table was prepared by a subordinate of Bishop Cyril of Alexandria shortly before Cyril's death in 444. It covered a period of 95 years or five decennovenal (19-year) cycles with years dated in the Diocletian Era, whose first year was 285 (the modern historical year in progress at Easter). Diocletian years were advantageous because their division by 19 yielded a remainder equal to the year of the decennovenal cycle