They interpret the meaning of symbols or image in the art work. The images have some association with past events or the real world. Art historians do careful research and have a wide knowledge of artifacts and past events. This serves as a guide for them to unlock the mysteries and interconnection of images on the painting.
The Rule of Law is supported by the 10 commandments.
The emergence of domestic political parties in the united stated are divided whether they will continue or not their support the Republicans, French Revolution and Federalist that came to suspect the worst intentions of the other and they will organized against each other.
The Tigris and Euphrates rivers in Mesopotamia were erratic. The rivers would flood or drought unpredictably and even shift their courses. Also, the Tigris had high banks which meant water irrigated from it would have to be drawn upward from the banks.
The Nile on the other hand followed a consistent annual inundation that brought water and fertile silt deposits right onto the crop fields. Egyptian farmers simply had to wait for the flood to recede some and plant their crops; the water and nutrient soil was already provided by the River.