What is a.d. 900?

A.D. 900 was a significant period in history, and several significant events occurred during this time:

1. The Tang Dynasty of China was at its peak, and the country was experiencing a golden age of arts and literature.

2. In Europe, the Viking Age was at its peak, and the Vikings were expanding their territory through exploration and conquest.

3. Agriculture in Europe was booming, and new systems of crop rotation and irrigation were being developed, leading to significant increases in food production.

4. In the Islamic world, the Abbasid Caliphate was at the height of its power and influence, and the House of Wisdom was founded in Baghdad, a center for learning and scholarship.

5. The Maya civilization in Central America was experiencing a decline, and cities were abandoned due to political instability, environmental degradation, and drought.

Overall, A.D. 900 was a time of cultural and economic flourishing, as well as political upheaval and decline in some regions of the world.