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In page Jericho:

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In the late 4th millennium BCE, Jericho was occupied during Neolithic 2 and the general character of the remains on the site link it culturally with Neolithic 2 (or PPNB) sites in the West Syrian and Middle Euphrates groups. This link is established by the presence of rectilinear mud-brick buildings and plaster floors that are characteristic of the age.[citation needed]