Up until the mid-14th century, Europe had experienced steadily increasing urbanisation. Cities were also decimated by the Black Death, but the role of urban areas as centres of learning, commerce and government ensured continued growth. By 1500, Venice, Milan, Naples, Paris and Constantinople each probably had more than 100,000 inhabitants. Twenty-two other cities were larger than 40,000; most of these were in Italy and the Iberian peninsula, but there were also some in France, the Empire, the Low Countries, plus London in England.
Is there an answer to this question (If it cannot be answered, say "unanswerable"): What event decimated urban populations in the 13th century?
unanswerable