Terracina is mentioned in the history of the Gothic War, and Theodoric is said to have had a palace here. It was sacked in 409 and 595. After the Lombards had conquered part of Italy in the late 6th century, Terracina remained an important military stronghold of the Eastern Roman Empire, and later became part of the Duchy of Naples. It was one of the northernmost outposts of Byzantine authority in the south. A monument bearing the name of Duke George of Naples stood there at the turn of the 20th century.