From my curiosity for history of mathematics and geometry, I propose a reading and analysis of Archimedes' demonstration of the measure of a circle. There is no need to have any particular knowledge in mathematics to read and understand the text. This is open to anybody interested, we can take the time to study the maths required if there is a difficulty somewhere. I am not a specialist in the history of mathematics, but I'd enjoy exploring this field with others, and depending on our collective curiosity there are two other texts we can read to continue the study.