A method of erecting a plurality of towers (20, 20', 20", 20"'), each tower having a height ranging between a minimum height and a maximum height, for a wind energy turbine, comprising, for each tower, connecting together: - a first, substantially conical, tower segment comprising a steel tube having a predetermined length (l 1), - a second, substantially conical, tower segment comprising a steel tube having a predetermined length (l 2), said second tower segment adjacent to and connected to said first tower segment; and - a third, substantially cylindrical, tower segment (14,16) comprising a steel tube having a length between a predetermined minimum length and a predetermined maximum length, said third tower segment adjacent to and connected to said second tower segment; characterized by: - said plurality of towers comprising at least a first and a second tower, wherein the height of said first and second tower is substantially different; - for each of said plurality of towers, said predetermined length of said first, substantially conical, tower segment being substantially the same (l 1); - for each of said plurality of towers, said predetermined length of said second, substantially conical, tower segment being substantially the same (l 2); - for each of said plurality of towers, said length of said third, substantially cylindrical, tower segment (14,16) being variable between a minimum length and maximum length; and - for each tower selecting the length (l 3,l 4) of the third tower segment (14,16) to provide the necessary height of the tower between its minimum height and its maximum height, the minimum height being the sum of the predetermined lengths (l 1,l 2) of the first and second tower segments (10,12) and the minimum length of the third tower segment (14,16), and the maximum height being the sum of the predetermined lengths (l 1,l 2) of the first and second tower segments (10,12) and the maximum length of the third tower segment (14, 16). - a first, substantially conical, tower segment comprising a steel tube having a predetermined length (l 1), - a second, substantially conical, tower segment comprising a steel tube having a predetermined length (l 2), said second tower segment adjacent to and connected to said first tower segment; and - a third, substantially cylindrical, tower segment (14,16) comprising a steel tube having a length between a predetermined minimum length and a predetermined maximum length, said third tower segment adjacent to and connected to said second tower segment; - said plurality of towers comprising at least a first and a second tower, wherein the height of said first and second tower is substantially different; - for each of said plurality of towers, said predetermined length of said first, substantially conical, tower segment being substantially the same (l 1); - for each of said plurality of towers, said predetermined length of said second, substantially conical, tower segment being substantially the same (l 2); - for each of said plurality of towers, said length of said third, substantially cylindrical, tower segment (14,16) being variable between a minimum length and maximum length; and - for each tower selecting the length (l 3,l 4) of the third tower segment (14,16) to provide the necessary height of the tower between its minimum height and its maximum height, the minimum height being the sum of the predetermined lengths (l 1,l 2) of the first and second tower segments (10,12) and the minimum length of the third tower segment (14,16), and the maximum height being the sum of the predetermined lengths (l 1,l 2) of the first and second tower segments (10,12) and the maximum length of the third tower segment (14, 16).