I think you mean the Roman Empire. The Empire was pretty known for it's use of columns in it's day
greek
the use of stone in architecture and sculpture
The Roman civilization is best known for its use of arches. They extensively used the arch in their architecture, including in famous structures such as the Colosseum and aqueducts. The invention and mastery of the arch allowed the Romans to create grand and durable structures that still stand today.
babylonians
maya
babylonians
Sumer was a civilization and historical region in southern Mesopotamia, modern Iraq. It is the earliest known civilization in the world and is known as the Cradle of Civilization. The cuneiform writing system is the answer to your question.
The leader you use has more of an effect on gameplay than the civilization, and the best one depends on what strategy you use when you play. For example, if you want to win by conquest or domination, then you want a leader with aggressive, imperialistic, or expansive leader traits. In my experience, the best leaders to be are the Carthaginians, Chinese, Americans or the Egyptians.
Probably the best use is as fuel for power reactors.
I think you mean columns. The columns on the front of the building were Greek. I was impressed by the number of columns on the building.
The first known occurrence was in 3 B.C., in the country of Greece.