The Maya civilization spread across the territory of present-day Belize around 1500BC and flourished there until about AD900. The recorded history of the middle and southern regions focuses on Caracol, an urban political centre that may have supported over 140,000 people. North of the Maya Mountains, the most important political centre was Lamanai. In the late Classic Era of Maya civilization (600–1000AD), an estimated 400,000 to 1,000,000 people inhabited the area of present-day Belize.