Why is Philadelphia is like ancient Sumer?

Philadelphia is like ancient Sumer is discussed below in details.

Explanation:

Before we talk about why Philadelphia is known as ancient Sumer we need to know what is Sumer. Sumer was an ancient civilization established in the Mesopotamia area of the Fertile land located between the Euphrates and Tigris rivers. It is famous for its variations in language, governance, structure, and more, Sumerians are acknowledged as the inventors of civilization as modern humans. Now, Philadelphia is known as ancient Sumer because same as Sumerian cities, Ancient Philadelphia cities were built mostly of mud bricks, with walls for defense.