This document provides a historical overview of calculations of the mathematical constant pi. It describes how ancient cultures like the Egyptians, Babylonians, and Bible approximated pi as 3. It then discusses how Archimedes was the first to theoretically calculate pi between 223/71 and 22/7. The document traces how mathematicians and scientists from cultures like Greek, Islamic, Indian, and European progressively calculated pi to more decimal places over centuries, with modern computers allowing for thousands of decimal places. It emphasizes how calculating pi more precisely has been an ongoing goal of the scientific community to enable more accurate measurements.