When was pi discovered

Pi was discovered way back already the way to Babylonians and Egyptians 216 BC but none were all the way accurate they were close

As early as 1900 BC, geometers from ancient civilizations such as Babylon, India, and Egypt, are already aware of one fundamental property of the circle: that a circle's circumference is always a little over three times that of its diameter. A more precise value was not available however as each of the civilizations computed pi only within 1% of its actual value.