“The circumference of the circle is the line that surrounds the figure in such a way that all the straight lines drawn to it through the center of the circle are equal in length to one another. This concept is also called

*ambitus, circuitus, curvatura, circulus*and in Greek is known as the*periphereia*.” (__- Hessler 2008)__*Cosmographiae introductio*, chap. I