Marrakesh or Marrakech is the fourth-largest city in Morocco. It is one of the four imperial cities of Morocco and is the capital of the Marrakesh–Safi region. The city lies west of the foothills of the Atlas Mountains. The city was founded circa 1070 by Abu Bakr ibn Umar as the capital of the Almoravid dynasty. The Almoravids established the first major structures in the city and shaped its layout for centuries to come.