Stanford Torus Space Settlement (1975)
Rohit Khare stashed this in Singularity
From the NYT Elysium review, of all places…
The Stanford Torus was the principal design considered by the 1975 NASA Summer Study, which was conducted in conjunction with Stanford University (and published as Space Settlements: A Design Study, NASA Publication SP-413). It consists of a torus or donut-shaped ring that is one mile in diameter, rotates once per minute to provide Earth-normal gravity on the inside of the outer ring, and which can house 10,000 people.
40 years later we are still waiting.