There were empty place holders signs in place-number systems of Babylonia and ancent China that function like our zero numeral. But this placeholder did not enter arithmetic operations. So it is not considered the "modern" zero.
Ditto creating negative numbers for cmpleting the subtraction operation group. Ratios for cardinal division. Real numbers for some ratios that are not cardinals. Infinity for zero divisors. Irrationals for roots of cardinals. Imaginaries for roots of negatives. Infinitesmals in differentiation and integration. And so on ...
At some point in medevial times each of these new numbers were considered the work of the Devil because they did not have concrete existance in the physical world. Later on accountants showed how zero & negative numbers were usefule for business. And physicists showed how these new numbers could predict the physical world.