Great people: Euclid.

 Euclid (Εὐκλείδης) was a mathematician in ancient Greece. Euclid of Alexandria was born in mid-4th century BC.

Also, he was known as the "father of geometry". Because Euclid made many things for this science.

He lived in Alexandria. Euclid created many different works about mathematics, algebra, and geometry. There is Euclidean geometry.

Now Euclid's works studied in schools and universities. 

Euclid, the Greek mathematician died in mid-3rd century BC.