What is ad 800?

AD 800 refers to the time period between the year 800 and 899 in the Gregorian calendar. It was during this time that the Carolingian Empire, led by Charlemagne, began to decline and break apart after his death in 814. The Viking Age also began during this period, with Norse warriors raiding and colonizing parts of Europe and North America. This period also saw the spread of Christianity throughout Europe, with the establishment of new churches, monasteries, and religious orders. The Byzantine Empire was also a prominent power during this period, expanding its territory and cultural influence. In science and technology, the Islamic Golden Age was in full swing, with scholars making significant advances in mathematics, astronomy, and medicine. The year 800 is also significant as it marks the crowning of Charlemagne as Holy Roman Emperor by Pope Leo III.