The history of the conquest of the Gauls (aka Celts) written by Julius Caesar.
Physics, the mind, soul, the movements of the universe, and sex, obviously50 BCE
The history of Rome from by Titus Livius Patavinus
How to build roads, buildings and aqueducts with Roman precision15 BCE
The transformations of man and gods from before formation of the world1 CE
The adventures of Aeneis the Trojan, and what happens when the gods hate you19 CE
The warlike tribes of ancient Spain