Lower Mesopotamia Lower Mesopotamia Lower Mesopotamia is a historical region of Iraq. Also known as the Sawad and al-'Irāq al-'Arabi ("Arabian Irāq") in the Middle Ages. Lower Mesopotamia was home to ancient Sumerian and Babylonian civilisations. An alluvial plain begins north of Baghdad and extends to the Persian Gulf. Here the Tigris and Euphrates rivers lie above the level of the plain in many places, and the whole area is a river delta interlaced by the channels of the two rivers and by irrigation canals. Intermittent lakes, fed by the rivers in flood, also characterize southeastern Iraq. A fairly large area ()
Poly Prep Country Day School Poly Prep Country Day School Poly Prep Country Day School (known familiarly as Poly Prep) is an independent school with two campuses in Brooklyn, New York, United States. Middle School (5th to 8th grades) and Upper School (9th to 12th grades) are located in the Dyker Heights section of Brooklyn. Lower School (nursery to 4th grade) is located in Brooklyn's landmarked Park Slope neighborhood. Initially founded as part of the Brooklyn Collegiate and Polytechnic Institute (predecessor of the NYU Tandon School of Engineering), Poly Prep now offers classes from nursery school through 12th grade. Poly Prep Country Day School was