A building having at least in one building portion an arrangement of a plurality of modules (20) positioned side by side, said modules in each case: having prefabricated module design, having a size so as to be transportable with a road vehicle, and having a useful room (14) as well as at least a partial width of a corridor section (12a) adjacent the useful room; and said modules (20) being positioned side by side with adjacent corridor sections (12a). Modules (20) for erecting such a portion of a building (2). Method for erecting such a portion of a building (2).
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