There is also The Ring in the Xeelee universe - which is millions of lightyears ...

		arethuza on Feb 28, 2024 \| parent \| context \| favorite \| on: 'Mathematically perfect' star system being investi... There is also The Ring in the Xeelee universe - which is millions of lightyears across: https://xeelee.fandom.com/wiki/The_Ring Mind you it might not count as it's a means of escape, not a place to live.