The correct answer to this open question is the following.
The elements of the Celtic culture that survived their invasions were the following.
One of them was the way they forged iron and produced weapons such as blades. The Celtic technique influenced the Roman Army. Celts knew how to work with iron. Celtic metalwork and cultural traditions were an important part of the Iron Age in Europe, reaching far places in the Mediterranean.
Another key aspect that transcended was the way they saw and pa¿ractice religion. They focused on worship elements of nature. They could be considered spiritual people, not religious people.
Another important element was Celtic art that passed the test of time and influenced the Romans and can be admired even today in places such as Scotland and Ireland, where buildings and temples contain much of the influence of Celtic art.
