It was in Algeria in 1880
Fibonacci, the young son of an Italian diplomat, was the first witness of the indian numbers power. When he grew up, he decided to take these numbers to Italy. He wrote a calculations book. Later, he became the greatest mathematician of his century.
In the 13th century, the people used Roman numbers but, in 1299, the city of Florence forbade the merchants to use Roman numbers. At the same time a new number, Zero, was created but the people mistrubted it because they thought this number brought some difficulties.