Isin (ĭsˈĭn) [key], capital of an ancient Semitic kingdom of N Babylonia. The city became important after the third dynasty of Ur fell to the Elamites and the Amorites (c.2025 B.C.). The phase from c.2025–c.1763 B.C. is sometimes called the Isin-Larsa period. Many city-states vied with one another, but Isin and Larsa were the most powerful of these. Excavations have brought to light the law code of King Lipit-Ishtar of Isin. This code is one of several codes that predate the stele of Hammurabi.

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