Answer:
The urban revolution occurred independently in many places and at many times. It seems to have developed first in Mesopotamia, in ancient Sumer, as early as 5000 bp. Cities appeared somewhat later in Egypt. In northern China, the peoples of the Longshan culture were the first to urbanize (about 4500 bp).
Step-by-step explanation:
Around the 12th century, the European urban revolution completely changed the landscape of Medieval Europe. The populations of old cities grew exponentially, and new towns and cities sprung up across Europe.