 In northern Sauerland and the Weser Uplands there was less of a sharp boundary and more of a gradual reduction in floor area as the terrain became hillier.In southern Lower Saxony the Hessian square farmstead ("Vierkanthof") is found well inside the Low German language area.In east Lower Saxony the "Niedersachsenhaus" and the square farmstead are interspersed like a mosaic.