Mesopotamia is an ancient region located in the eastern Mediterranean, corresponding to present-day Iraq, mostly, but also parts of modern-day Iran, Syria and Turkey. It's known as the birthplace of some of the world's earliest civilizations.
Sumerians: The Sumerians were one of the earliest urban societies to emerge in the world, in Southern Mesopotamia more than 5000 years ago. They developed a writing system whose wedge-shaped strokes would influence the style of scripts in the same geographical area for the next 3000 years.
Cuneiform: This is a system of writing first developed by the ancient Sumerians of Mesopotamia around 3500-3000 BCE. It's considered one of the most significant contributions from this civilization.
Ziggurat: A ziggurat is a type of massive structure built in ancient Mesopotamia. It has a terraced compound with successively receding stories or levels.