Good point, I forgot about Mir. According to wikipedia it lasted from 1986 to 20...

		elihu on Jan 23, 2021 \| parent \| context \| favorite \| on: One hull crack located in ISS, another one suspect... Good point, I forgot about Mir. According to wikipedia it lasted from 1986 to 2001. I had briefly considered Skylab, but figured it didn't really count as "permanent". Wikipedia says it was up for 24 weeks.