A double bar graph titled Population of European Cities. The left bar is labeled 100 C E. The right bar is labeled 1000 C E. The x-axis is labeled Rome, Paris, and London. The y-axis is labeled Population (in thousands) 0 to 500. In 100 C E, Rome is at 450,000; Paris is at 80,000; London is at 60,000. In 1000 C E, Rome is at 50,000; Paris is at 20,000; London is at 40,000. According to the chart, urban population
from 100 CE to 1000 CE.

The population in Rome decreased by
people from 100 CE to 1000 CE.