Year 510 (DX) was a common year starting on Friday (link will display the full calendar) of the Julian calendar. In the Roman Empire, it was known as the Year of the Consulship of Severinus without colleague (or, less frequently, year 1263 Ab urbe condita). The denomination 510 for this year has been used since the early medieval period, when the Anno Dominicalendar era became the prevalent method in Europe for naming years.
King Theodoric the Great raises the Frankish siege at Arles; the city is heroically defended by its inhabitants, assisted by the Ostrogothic general Theudis. The Ostrogoths overrun Provence (Southern Gaul), and consolidate their gains in the region.