The Isin-Larsa period (circa 2025-1763 BCE, Middle Chronology, or 1961-1699 BCE, Short Chronology) is a phase in the history of ancient Mesopotamia, which extends between the end of the Third Dynasty of Ur and the conquest of Mesopotamia by King Hammurabi of Babylon leading to the creation of the First Babylonian dynasty. According to the approximate conventional dating, this period begins in 2025 BCE and ended in 1763 BCE. It constitutes the first part of the Old Babylonian period (2025-1595 BCE), the second part being the period of domination of the first dynasty of Babylon, which ends with the Sack of Babylon in 1595 BCE and the rise of the Kassites.