The Sumerian language was the language of ancient Sumer, spoken in Southern Mesopotamia since at least the 4th millennium BC. It was gradually replaced by Akkadian as a spoken language in the beginning of the 2nd millennium BC, but continued to be used as a sacred, ceremonial, literary and scientific language in Mesopotamia until the first century AD. Then, it was forgotten until the 19th century, when Assyriologists began deciphering the cuneiform inscriptions and excavated tablets left by these speakers. Sumerian is a language isolate.
The Sumerian language is the earliest known written language. It first appeared as numerical records, with symbols added to represents the things counted, which then developed into a logographic script representing the whole language, not just accounting objects. The logographic symbols were then generalized using a wedge-shaped stylus to impress the shapes into wet clay, giving rise to the name cuneiform, meaning "wedge-shape". These distinctive wedge shapes were imitated even in carved inscriptions. By ca. 2600 BC, the large set of logographic signs had been simplified into a syllabary of several hundred signs, allowing modern Assyriologists to understand many aspects of the phonology, morphology and syntax of the language.
He also waged war against Egypt and started rebuilding Babylon. His son, crown prince Nebuchadrezzar II, defeated Egypt shortly before Nabopolassar died, and would then go on to make Babylon one of the wonders of the world.