Today I present the structure and composition of a rotating space station located around L1 of the Earth-Moon system. The torus, in order to generate minimal but comfortable gravity through its rotation, must be positioned at a distance from the center such that the number of rounds per minute required to achieve this gravity, is minimal. The central axis, in zero gravity, must house all the services for which gravity is unnecessary, or even detrimental. The relationship between the rotating torus and the stationary central axis is complex on account of this difference.