After the fall of Rome no state or government united the people who lived on the European continent besides the Catholic Church. The church became the most powerful institution of the medival times. Kings and leaders derived much of their power from their alliance and protection with the church. 800 CE Pope Leo III crowned Frankish king Charlemagne the emperor of the Romans. Charlemagne’s realm became the Holy Roman Empire. It was one of several political entities in Europe whose interests tended to align with those of the Church. The rise of the Islam. The Islamic world was growing bigger and more powerful. In 632 CE After Muhammad’s death the muslim armies conquered big parts of the Middle eats. Uniting them under the rule of a single caliph.
