A tower comprising: at least one vertical-axis wind turbine rotor ; and a tower structure with a plurality of superimposed stage levels (NE) for supporting said at least one vertical-axis wind turbine rotor, the structure having a vertical axis of symmetry (Δ) and remaining identical to itself in rotations of ±120° about said axis of symmetry, each rotor being contained between two successive stage levels (NE) of the structure, and the axis of each rotor being coincident with the axis of symmetry (Δ) of the structure, the structure comprising an assembly of linear and rigid segments which includes at least: - three uprights each extending between a base and a top of the structure; - at least two sets of stage segments ; and - support segments , wherein the stage segments of one and same set are assembled at a stage level (NE) of the structure, to form a horizontal polygon at said stage level, each stage segment forming one side of the polygon and connections between respective ends of two successive stage segments in the polygon forming a vertex of said polygon, three of the vertices of each polygon, referred to as edge vertices , being respectively connected to the three uprights , and any two of the edge vertices of each polygon being separated by at least one other vertex of said polygon, referred to as the intermediate vertex of the pair of two edge vertices, wherein, for each pair of edge vertices of any one of the polygons, at least one intermediate vertex is further connected obliquely to at least one of the uprights to which one of the edge vertices of the pair is connected, by two support segments respectively towards the top and towards the bottom of the tower, and wherein, for each polygon, each intermediate vertex is located outside a triangle formed by the edge vertices of said polygon. at least one vertical-axis wind turbine rotor ; and a tower structure with a plurality of superimposed stage levels (NE) for supporting said at least one vertical-axis wind turbine rotor, the structure having a vertical axis of symmetry (Δ) and remaining identical to itself in rotations of ±120° about said axis of symmetry, each rotor being contained between two successive stage levels (NE) of the structure, and the axis of each rotor being coincident with the axis of symmetry (Δ) of the structure, the structure comprising an assembly of linear and rigid segments which includes at least: - three uprights each extending between a base and a top of the structure; - at least two sets of stage segments ; and - support segments , - three uprights each extending between a base and a top of the structure; - at least two sets of stage segments ; and - support segments , wherein the stage segments of one and same set are assembled at a stage level (NE) of the structure, to form a horizontal polygon at said stage level, each stage segment forming one side of the polygon and connections between respective ends of two successive stage segments in the polygon forming a vertex of said polygon, three of the vertices of each polygon, referred to as edge vertices , being respectively connected to the three uprights , and any two of the edge vertices of each polygon being separated by at least one other vertex of said polygon, referred to as the intermediate vertex of the pair of two edge vertices, wherein, for each pair of edge vertices of any one of the polygons, at least one intermediate vertex is further connected obliquely to at least one of the uprights to which one of the edge vertices of the pair is connected, by two support segments respectively towards the top and towards the bottom of the tower, and wherein, for each polygon, each intermediate vertex is located outside a triangle formed by the edge vertices of said polygon. <EOS>