Ptolemy was one of the most famous mathematicians of all time. He lived in Alexandria, Egypt during the 2nd century AD. His work on mathematics and astronomy is still studied and admired today. Ptolemy’s life was filled with adventure and discovery, and his work has had a lasting impact on the field of mathematics.

### Early Life

**Claudius Ptolemy **was born in the Egyptian city of Alexandria in around AD 100. He was a brilliant mathematician and astronomer, whose work on mapping the stars would be used for centuries afterward.

In his early twenties, Ptolemy became head of the famed Library of Alexandria – a position he retained until his death. It was here that he wrote most of his work, including the Almagest – a thirteen-volume treatise on astronomy.

### Achievements

Ptolemy’s astronomical models were based on the belief that Earth was at the center of the universe. However, by using increasingly sophisticated mathematics, he was able to accurately predict the movements of the planets and other celestial bodies.

Despite his brilliance, Ptolemy’s work was largely ignored by later astronomers. This was mainly because it relied on an incorrect model of the universe. However, his contributions to mathematics and astronomy were nevertheless significant.

Ptolemy was one of the most accomplished mathematicians and astronomers of his time. His work on mapping the stars would be used for centuries afterward, and his contributions to mathematics and astronomy were significant.

### Later Life

Ptolemy died in Alexandria around 168 AD.