The year 704 BC was a year of the pre-Julian Roman calendar. In the Roman Empire, it was known as year 50 Ab urbe condita . The denomination 704 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events Sennacherib moves the Assyrian capital to Nineveh. Births Deaths Duke Xian of Qin (725–704 BC) References 700s BC