The Dark Ages refers to the period from 400 AD to 1400 AD in Europe. Originally, Christians used the terms "dark" and "light" to describe the darkness before Jesus brought light to the world. Later, the Italian scholar Petrarch described the loss of learning from the Greeks and Romans as plunging Europe into the "dark." Historians then viewed the Dark Ages as a time of little culture, repeated invasions, no central government, and a poor economy and standard of living. However, many historians now disagree with labeling this entire period as a "Dark Age."