Arch of the Sergii is an Ancient Roman triumphal arch located in Pula, Croatia. The arch commemorates three brothers of the Sergii family, specifically Lucius Sergius Lepidus, a tribune serving in the twenty-ninth legion that participated in the Battle of Actium and disbanded in 27 BC . This suggests an approximate date of construction: 29-27 BC. The arch stood behind the original naval gate of the early Roman colony.