0 (number) > Classical antiquity; https://en.wikipedia.org/wiki/0#Classical_antiquity https://en.wikipedia.org/wiki/0#Classical_antiquity : > By AD 150, Ptole

0 (number) > Classical antiquity; https://en.wikipedia.org/wiki/0#Classical_antiquity https://en.wikipedia.org/wiki/0#Classical_antiquity : > By AD 150, Ptolemy, influenced by Hipparchus and the Babylonians, was using a symbol for zero ( — ° ) [25][26] in his work on mathematical astronomy called the Syntaxis Mathematica, also known as the Almagest. [27] This Hellenistic zero was perhaps the earliest documented use of a numeral representing zero in the Old World. [28]