Faubourg (pronounced [fo.buːʁ]) is an ancient French term approximating "suburb" (now generally termed banlieue). The earliest form is forsbourg, derived from Latin foris, 'out of', and Vulgar Latin (originally Germanic) burgum, 'town' or 'fortress'. Traditionally, this name was given to an agglomeration forming around a throughway leading outwards from a city gate, and usually took the name of the same thoroughfare within the city. As cities were often located atop hills (for defensive purposes), their outlying communities were frequently lower down. Many faubourgs were located below their towns, and the term "suburbs" is derived from this tendency (sub = below; urbs urbis = city).