'0' (zero) has long been recognised as having been conceived in India, by Indian thinkers. But the earliest example of its use in a discussion has just been found.
The document in which it was found is known as the Bakhshali manuscript and is dated to the third or fourth centuries.
And a report on the discovery may be found in the UK news outlet, The Guardian, Australian Edition. - https://www.theguardian.com/science/2017/sep/14/much-ado-about-nothing-ancient-indian-text-contains-earliest-zero-symbol
PS, for the sake of accuracy, we should note the caveat in the Guardian's version:
Quote: "Several ancient cultures independently came up with similar placeholder symbols. The Babylonians used a double wedge for nothing as part of cuneiform symbols dating back 5,000 years, while the Mayans used a shell to denote absence in their complex calendar system.
However the dot symbol in the Bakhshali script is the one that ultimately evolved into the hollow-centred version of the symbol that we use today. It also sowed the seed for zero as a number, which is first described in a text called Brahmasphutasiddhanta, written by the Indian astronomer and mathematician Brahmagupta in 628AD.