Gemini Twin, if I recall my Boeing history correctly, Plant II was used to build B-17s (and the Minute Man ICBM, among other things), but the Renton plant was constructed to build the B-29.
It was rather bittersweet to see Plant II go down...
While the Renton plant is has contracted a bit over the last 20 years, it's still where all 737s are currently built (and will be built for the foreseeable future). Currently at 2/Mday
