There is apparently a
chapel thingy onboard the ship in "Balance of Terror".
I can just see a Flying Fortress ship, complete with towers and drawbridge, in combat though...
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“There must have been a point in early human history when it was actually advantageous to, when confronted with a difficult task, drop it altogether and go do something more fun, because I do that way too often for it to be anything but instinct.” -- Isto Combs