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
Rye Country Day School center, built in 2018. Memorial Hall, built in 2010, seats 125.<br> Athletic Facilities<br> Athletic facilities include four artificial turf fields; the Scott A. Nelson Athletic Center (2000), which houses a two-court gymnasium, four squash courts, four locker rooms, an athletic training facility, a fitness center and a multipurpose gymnasium that serves as the home for the wrestling and fencing programs; the LaGrange Field House (1972) with its indoor ice rink/tennis courts.<br> Rye Country Day School Rye Country Day School, also known as Rye Country Day or RCDS, is an independent, co-educational college preparatory school located in Rye, New York. Its