You go... how do u not know that... rly.
I believe it was either the Sumerians or the Mesopotamians, hope this helps! :-)
The center of the Roman Empire is in Italy. ROME. And to be specific,
there was a spot in the forum called the "umbilicus urbis Romae" which
is translated "the center of the city of Rome" or "the navel of Rome".
At any rate, it was the spot from which all distances, from all over the
empire, were measured.
b) changing the style of a jazz piece
Hope I helped! ( Smiles )