Jericho is among the oldest cities in the world,and it is also the city with the oldest known defensive wall.Archaeologists have unearthed the remains of more than 20 successive settlements in Jericho, the first of which dates back 11,000 years (to 9000 BCE), almost to the very beginning of the Holocene epoch of the Earth's history.Copious springs in and around the city have attracted human habitation for thousands of years. Jericho is described in the Bible as the "city of palm trees".
–Wikipedia