Geometric Period (11th-8th century BC)

Athena Art - " Goddess of Wisdom Courage & Strength "

Aithra (Αίθρα) 

According to Vitruvius and to the Roman historian Titus Livy (1st century BC).

Theseus' mother, Aethra (10th-9th century BC) taught the children of Triziana accounting (practical arithmetic) that was based on the use of abacus and some symbols, where there was no zero, making the symbolism of the numbers very difficult.