The Middle Ages lasted from around 500 AD to 1500 AD. This period between the fall of the Roman Empire and the modern era is also known as the Dark Ages (500-1000 AD) and saw the rise of the Franks and Charlemagne's empire in Western Europe. Charlemagne's empire influenced the development of feudalism and serfdom across Europe and helped establish the Holy Roman Empire. The Viking invasions further disrupted society during this time.