Prehistoric Jericho, also known as Tell el-Sultan, is one of the most important Neolithic sites excavated by archaeologists, and contains key examples of Neolithic art and architecture. Prehistoric people had settled at the Jericho site as early as 12,000 B.C.E. and domestication of animals began around 9,000 B.C.E. The architecture of Neolithic Jericho included mud-brick houses with plastered floors, which were painted red and white, as well as evidence of sophisticated fortifications including 22 a twenty-eight-foot high stone tower and twenty-foot high walls surrounding the village. By 7000 B.C.E., as many as two thousand people may have lived in Neolithic Jericho.