Roman Catholic is the main religion, the people in Southern Spain are very religious.
Answer:
To Ward Off Evil Spirits
Explanation:
This would be by process of elimination.
To disguise them or make them look more life like for ancient times would not be realistic.
The Romans used the Arch and Dome for buildings mostly, for example the aqueducts.
They needed to find more land for more opportunities for factories and trading. To spread their civilization to other people
