They used to do nuclear physics research (and still do to some extend) there and had an experimental fast breeder reactor (capable of producing weapons grade pl

They used to do nuclear physics research (and still do to some extend) there and had an experimental fast breeder reactor (capable of producing weapons grade plutonium) on campus. They also prepared for rapid development of nuclear weapons capabilities in the 60s. It was a site for a potential German nuclear weapons program, I think they would have been able to produce enough material in ~6 weeks. They frame it as "nuclear disarmament" now of course https://www.fz-juelich.de/en/news/archive/press-release/2022/2022-04-08-nudive-en https://www.fz-juelich.de/en/news/archive/press-release/2022..., but effectively if there is any place where scientists in Germany have active knowledge how to develop nuclear weapons it would be there. There are several former military installations close by, including barracks for a guards and supply company. You don't want something like that in a city centre.