Early Dynastic Period (Mesopotamia) Early Dynastic Period (Mesopotamia) The Early Dynastic period (abbreviated ED period or ED) is an archaeological culture in Mesopotamia (modern-day Iraq) that is generally dated to c. 2900–2350 BC and was preceded by the Uruk and Jemdet Nasr periods. It saw the invention of writing and the formation of the first cities and states. The ED itself was characterized by the existence of multiple city-states: small states with a relatively simple structure that developed and solidified over time. This development ultimately led to the unification of much of Mesopotamia under the rule of Sargon, the first monarch of the Akkadian
Rolling Hills Country Day School half basketball courts, one volleyball court, playground, synthetic turf sports field, music room, art studio, multi-purpose room for live performances, and iMac computer lab. Western Association of Schools and Colleges (WASC) Western Association of Schools and Colleges (WASC), Educational Records Bureau (ERB), California Kindergarten Association Rolling Hills Country Day School Rolling Hills Country Day School is a nonsectarian independent Kindergarten to Grade 8 school located on the Palos Verdes Peninsula in Los Angeles County, California. More specifically it is located in the area of Palos Verdes known as Rolling Hills Estates. Rolling Hills Country Day School was founded in 1961.