The document discusses how the power of monarchs grew across Europe during the Middle Ages. In England, kings gained power through conquest and centralizing authority, culminating in Magna Carta and the formation of Parliament to advise the king. In France, the Capetian dynasty extended control over the country. The Holy Roman Empire was decentralized, with local dukes maintaining authority. Kings in Iberia gained power by driving out the Moors through the Reconquista.