To add to the discussion of blades and churches...

I got married about two and a half years ago. Being an officer in the Canadian Naval Reserve I decided to wear my ceremonial uniform, which includes a sword. I ran it past the priest beforehand and he had no problems with it. In fact, there were half a dozen friends of mine in our sword party that were similarily armed. Any reasonable priest or minister should have no problem with an item of uniform or national dress.

Shane