Just inside the earthworks, at Lexden, are located the burial mounds of the rulers of Camulodunon, which contain large amounts of grave goods including imported Roman material from Europe; the largest of these mounds is the Lexden tumulus. The Lexden area around the mounds contains several Iron Age cremation burial groups, including one containing the "Mirror burial", with other burials located around the Camulodunon site. A large cluster of cremations from St. Clares road and Fitzwalter Road close to the Lexden Tumulus date to 50–10 BC.