The Sumerians invented one of the first writing systems.

The Great Pyramid of Giza was built over 4,500 years ago.

Romans built roads that are still used today.

Ancient Greeks held the first Olympic Games.

The Mayans had a sophisticated calendar system.

The Indus Valley civilization had planned cities with drainage.

The Chinese invented paper and gunpowder.

Egyptians worshipped over 2,000 gods and goddesses.

Vikings were skilled sailors and explorers.

The Aztecs built floating gardens called chinampas.