Sumerians: The Sumerians were the inhabitants of Sumer, an ancient region located in southern Mesopotamia. They developed one of the earliest known writing systems called cuneiform.
Ziggurat: A ziggurat was a massive stepped tower-like structure built by ancient Mesopotamian civilizations for religious purposes. It served as a temple dedicated to their gods.
Irrigation: Irrigation is the artificial application of water to land for agricultural purposes. Ancient civilizations like those at Ur relied on irrigation systems to support their farming activities.