Key Concepts and IDs for Unit 3 (600 C.E. ? 1450 C.E.) Chapters 8-15 The Islamic world made tremendous contributions to art, science, architecture and technology that would have a huge impact on cultural and economic developments in Asia, Africa, and Europe. The world of Islam represents peoples of different ethnicities, cultures, and languages throughout the Middle East, Africa, Asia, and parts of Europe who were unified through the religion of Islam while still maintaining regional diversity. After the fall of the Roman Empire, the western part of the empire became a decentralized feudal system while the eastern part of the empire continued under imperial rule as the Byzantine Empire.