This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
CursiveFour. The figures employed as early as the tenth century by Gebert appear in mathematical treatises in the twelfth century and are hardly found in other works before the fifteenth century In the fifteenth century the forms of the nine digits are newadvent org htm twelfth century author PDold Arabic numerals