Well done, P.
The Arsenal metro station in Paris opened in 1906. In late '39, once the war started, some stations were closed so more metro workers could get called up and Arsenal was won of them. Yet it didn't reopen after the war as it's right next to Bastille metro.
https://en.wikipedia.org/wiki/Arsena...is_M%C3%A9tro)
I've been there loads as we often get off at Bastille and walk as opposed to changing platforms and going one stop to St Paul. If you look at the little map on the wiki page, we live fairly close to Pont Marie on the pink line, though we generally go to St Paul to get the tube as it's on Line 1 which is more useful.
Both cities have forts or churches built by the Knights Templar and both cities of course needed their own arsenals. Same might be true of other capitals.
But well done, P. Surprised Fash didn't know.